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6.12.2011 Official
Journal
of
the
European
Union L
323/1
II
(Non-legislative acts)
ACTS ADOPTED BY BODIES CREATED BY
INTERNATIONAL AGREEMENTS
Only the original UN/ECE texts have legal effect under international public law. The status and date of entry into force of this Regulation
should be checked in the latest version of the UN/ECE status document TRANS/WP.29/343, available at:
http://www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29fdocstts.html
Regulation No 3 of the Economic Commission for Europe of the United Nations (UN/ECE) —
Uniform provisions concerning the approval of retro-reflecting devices for power-driven vehicles
and their trailers
Incorporating all valid text up to:
Supplement 12 to the 02 series of amendments — Date of entry into force: 23 June 2011
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Application for approval
4. Markings
5. Approval
6. General specifications
7. Special specifications (tests)
8. Conformity of production
9. Penalties for non-conformity of production
10. Production definitely discontinued
11. Names and addresses of technical services responsible for conducting approval tests, and of adminis
trative departments
12. Transitional provisions
ANNEXES
Annex 1 — Retro-reflecting devices, symbols, units
Annex 2 — Communication concerning the approval (or refusal or withdrawal of approval or
production definitely discontinued) of a type of retro-reflecting device pursuant to Regulation
No 3
Annex 3 — Examples of approval marks
Annex 4 — Test procedure — Class IA and Class IIIA
Annex 5 — Specifications of shape and dimensions
Appendix — Retro-reflectors for trailers — Classes IIIA and IIIB
Annex 6 — Colorimetric specifications
Annex 7 — Photometric specifications
Annex 8 — Resistance to external agents
Annex 9 — Stability in time of optical properties of retro-reflecting devices
Annex 10 — Resistance to heat
Annex 11 — Colour-fastness
Annex 12 — Chronological order of tests

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Annex 13 — Resistance to impact — Class IVA
Annex 14 — Test procedure — Class IVA
Annex 15 — Chronological order of tests for Class IVA
Annex 16 — Test procedure for Classes IB and IIIB devices
Annex 17 — Minimum requirements for conformity of production control procedures
Annex 18 — Minimum requirements for sampling by an inspector
1. SCOPE
This Regulation applies to retro-reflecting devices ( 1 ) for vehicles of categories L, M, N, O, and T ( 2 ).
2. DEFINITIONS ( 3 )
For the purpose of this Regulation,
2.1.
The definitions given in Regulation No 48 and its series of amendments in force at the time of
application for type approval shall apply to this Regulation.
2.2.
‘Retro-reflection’ means the reflection in which light is reflected in directions close to the direction
from which it came. This property is maintained over wide variations of the illumination angle.
2.3. ‘Retro-reflecting
optical
unit’
means
a
combination
of
optical
components
producing
retro-
reflection.
2.4. ‘Retro-reflecting
device’
( 1 ) means an assembly ready for use and comprising one or more retro-
reflecting optical units.
2.5.
‘Angle of divergence’ means the angle between the straight lines connecting the centre of reference
to the centre of the receiver and to the centre of the source of illumination.
2.6.
‘Illumination angle’ means the angle between the axis of reference and the straight line connecting
the centre of reference to the centre of the source of illumination.
2.7.
‘Angle of rotation’ means the angle through which the retro-reflecting device is rotated about its
axis of reference starting from one given position.
2.8.
‘Angular diameter of the retro-reflecting device’ means the angle subtended by the greatest
dimension of the visible area of the illuminating surface, either at the centre of the source of
illumination or at the centre of the receiver.
2.9.
‘Illumination of the retro-reflecting device’ is the abbreviated expression used conventionally to
designate the illumination measured in a plane perpendicular to the incident rays and passing
through the centre of reference.
2.10. ‘Coefficient of luminous intensity (CIL)’ means the quotient of the luminous intensity reflected in
the direction considered, divided by the illumination of the retro-reflecting device for given angles
of illumination, divergence and rotation.
2.11. The symbols and units used in this Regulation are given in Annex 1 to this Regulation.
2.12. A type of ‘retro-reflecting device’ is defined by the models and descriptive literature submitted with
the application for approval. Retro-reflecting devices can be considered as belonging to the same
type if they have one or more ‘retro-reflecting optical units’ which are identical with those of the
standard model, or if not identical are symmetrical and suitable for mounting one on the left and
one on the right side of the vehicle, and if their other parts differ from those of the standard model
only in ways not affecting the properties to which this Regulation applies.
2.13. Retro-reflecting
devices
are
divided
into
three
classes
according
to
their
photometric
characteristics:
Class IA or IB, Class IIIA or IIIB, and Class IVA.
( 1 ) Also called ‘retro-reflector(s)’.
( 2 ) As defined in Annex 7 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), (document TRANS/
WP.29/78/Rev.1/Amend.2 as last amended by Amend.4).
( 3 ) The definitions of the technical terms (excluding the ones in Regulation No 48) are those adopted by the International
Commission on Illumination (CIE).

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2.14. Retro-reflecting devices of Class IB and IIIB are devices combined with other signal lamps which are
not watertight according to Annex 8, paragraph 1.1, and which are integrated into the body of a
vehicle.
2.15. ‘Colour of the reflected light of the device’ The definitions of the colour of the reflected light are
given in paragraph 2.30 of Regulation No 48.
3. APPLICATION
FOR
APPROVAL
3.1. The
application
for
approval
shall
be
submitted
by
the
holder
of
the
trade
name
or
mark,
or
if
necessary by his duly accredited representative.
At the choice of the applicant, it will specify that the device may be installed on a vehicle with
different inclinations of the reference axis in respect to the vehicle reference planes and to the
ground or, in the case of Class IA, IB and IVA retro-reflectors, rotate around its reference axis; these
different conditions of installation shall be indicated in the communication form. It shall be
accompanied by:
3.1.1. drawings, in triplicate, in sufficient detail to permit identification of the type, showing geometrically
the position(s) in which the retro-reflecting device may be fitted to the vehicle, and in case of class
IB or IIIB-retro-reflectors details of installation. The drawings must show the position intended for
the approval number and class indicator in relation to the circle of the approval mark;
3.1.2. a brief description giving the technical specifications of the materials of which the retro-reflecting
optical unit is made;
3.1.3. samples of the retro-reflecting device of a colour specified by the manufacturer and, if necessary,
the means of fixation; the number of samples to be submitted is specified in Annex 4 to this
Regulation;
3.1.4. if necessary, two samples in other colour(s) for simultaneous or subsequent extension of the
approval to devices in other colour(s);
3.1.5. in the case of devices of Class IVA: samples of the retro-reflecting device and, if necessary, the
means of fixation; the number of samples to be submitted is specified in Annex 14 to this
Regulation.
4. MARKINGS
4.1. Every
retro-reflecting
device
submitted
for
approval
must
bear:
4.1.1. the
trade
name
or
mark
of
the
applicant;
4.1.2. the word ‘TOP’ inscribed horizontally on the highest part of the illuminating surface, if such an
indication is necessary to determine without ambiguity the angle or angles of rotation prescribed
by the manufacturer.
4.2. A
space
of
sufficient
size
to
accommodate
the
approval
mark
shall
be
provided
on
every
device.
This space shall be shown on the drawings referred to in paragraph 3.1.1 above.
4.3.
The markings must be applied on the illuminating surface, or on one of the illuminating surfaces,
of the retro-reflecting device and must be visible from the outside when the retro-reflecting device
is fitted on the vehicle.
4.4.
The markings must be clearly legible and be indelible.
5. APPROVAL
5.1.
If all the samples submitted meet the requirements of this Regulation, approval shall be granted.
5.2.
If the approval granted in respect of a retro-reflecting device is extended to other such devices
differing only in colour, the two samples in any other colour submitted in conformity with
paragraph 3.1.4 of this Regulation shall be required to meet only the colorimetric specifications,
the other tests no longer being required. Paragraph 5.2 is not applicable to devices of Class IVA.
5.3. An
approval
number
shall
be
assigned
to
each
type
approved.
Its
first
two
digits
(at
present
02,
corresponding to the 02 series of amendments which entered into force on 1 July 1985) shall
indicate the series of amendments incorporating the most recent major technical amendments

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made to the Regulation at the time of issue of the approval. The same Contracting Party shall not
assign the same number to another type of retro-reflecting device covered by this Regulation except
in the case of an extension of the approval to a device differing only in colour.
5.4.
Notice of approval or of extension or refusal of approval of a type of retro-reflecting device
pursuant to this Regulation shall be communicated to the Parties to the Agreement which apply
this Regulation, by means of a form conforming to the model in Annex 2 to this Regulation.
5.5.
There shall be affixed to every retro-reflecting device conforming to a type approved under this
Regulation, in the space referred to in paragraph 4.2 above and in addition to the markings
prescribed in paragraph 4.1.
5.5.1. an
international
approval
mark
consisting
of:
5.5.1.1. a circle surrounding the letter ‘E’ followed by the distinguishing number of the country which has
granted approval ( 1 );
5.5.1.2. an approval number;
5.5.1.3. a group of symbols IA, IB, IIIA, IIIB or IVA showing the class of the approved retro-reflecting
device.
5.6.
When two or more lamps are part of the same unit of grouped, combined or reciprocally incor
porated lamps (including a retro-reflector), approval is granted only if each of these lamps satisfies
the requirements of this Regulation or of another Regulation. Lamps not satisfying any one of
those Regulations shall not be part of such a unit of grouped, combined or reciprocally incor
porated lamps.
5.6.1. Where
grouped,
combined
or
reciprocally
incorporated
lamps
comply
with
the
requirements
of
several Regulations, a single international approval mark may be applied, consisting of a circle
surrounding the letter ‘E’ followed by the distinguishing number of the country which has granted
the approval, an approval number and, if necessary, the required arrow. This approval mark may be
placed anywhere on the grouped, combined or reciprocally incorporated lamps provided that:
5.6.1.1. it is visible after their installation;
5.6.1.2. no part of the grouped, combined or reciprocally incorporated lamps that transmits light can be
removed without at the same time removing the approval mark.
5.6.2. The
identification
symbol
for
each
lamp
appropriate
to
each
Regulation
under
which
approval
has
been granted, together with the corresponding series of amendments incorporating the most recent
major technical amendments to the Regulation at the time of issue of the approval, shall be
marked:
5.6.2.1. either on the appropriate light-emitting surface;
5.6.2.2. or in a group, in such a way that each lamp of the grouped, combined or reciprocally incorporated
lamps may be clearly identified (see the possible examples shown in Annex 3).
5.6.3. The size of the components of a single approval mark shall not be less than the minimum size
required for the smallest of the individual marks by a Regulation under which approval has been
granted.
( 1 ) 1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 8 for the
Czech Republic, 9 for Spain, 10 for Serbia, 11 for the United Kingdom, 12 for Austria, 13 for Luxembourg, 14 for
Switzerland, 15 (vacant), 16 for Norway, 17 for Finland, 18 for Denmark, 19 for Romania, 20 for Poland, 21 for
Portugal, 22 for the Russian Federation, 23 for Greece, 24 for Ireland, 25 for Croatia, 26 for Slovenia, 27 for Slovakia,
28 for Belarus, 29 for Estonia, 30 (vacant), 31 for Bosnia and Herzegovina, 32 for Latvia, 33 (vacant), 34 for Bulgaria,
35 (vacant), 36 for Lithuania, 37 for Turkey, 38 (vacant), 39 for Azerbaijan, 40 for The former Yugoslav Republic of
Macedonia, 41 (vacant), 42 for the European Community (Approvals are granted by its Member States using their
respective ECE symbol), 43 for Japan, 44 (vacant), 45 for Australia, 46 for Ukraine, 47 for South Africa, 48 for New
Zealand, 49 for Cyprus, 50 for Malta, 51 for the Republic of Korea, 52 for Malaysia, 53 for Thailand, 54 and 55
(vacant) and 56 for Montenegro. Subsequent numbers shall be assigned to other countries in the chronological order
in which they ratify or accede to the Agreement Concerning the Adoption of Uniform Technical Prescriptions for
Wheeled Vehicles, Equipment and Parts which can be Fitted and/or be Used on Wheeled Vehicles and the Conditions
for Reciprocal Recognition of Approvals Granted on the Basis of these Prescriptions, and the numbers thus assigned
shall be communicated by the Secretary-General of the United Nations to the Contracting Parties to the Agreement.

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5.6.4. An
approval
number
shall
be
assigned
to
each
type
approved.
The
same
Contracting
Party
may
not
assign the same number to another type of grouped, combined or reciprocally incorporated lamps
covered by this Regulation.
5.7. The
approval
mark
must
be
clearly
legible
and
indelible.
5.8. Annex
3
to
this
Regulation
gives
examples
of
arrangements
of
approval
marks
for
a
single
lamp
(Figure 1) and for grouped, combined or reciprocally incorporated lamps (Figure 2) with all the
additional symbols referred to above.
6. GENERAL
SPECIFICATIONS
6.1. Retro-reflecting
devices
must
be
so
constructed
that
they
function
satisfactorily
and
will
continue
to
do so in normal use. In addition, they must not have any defect in design or manufacture that is
detrimental to their efficient operation or to their maintenance in good condition.
6.2.
The components of retro-reflecting devices must not be capable of being easily dismantled.
6.3. Retro-reflecting
optical
units
may
not
be
replaceable.
6.4.
The outer surface of retro-reflecting devices must be easy to clean. Hence it must not be a rough
surface; any protuberances it may exhibit must not prevent easy cleaning.
6.5. For
devices
of
Class
IVA
their
means
of
fixation
shall
be
such
that
they
allow
a
stable
and
durable
connection between the device and the vehicle.
6.6. There
shall
be
no
access
to
the
inner
surface
of
the
retro-reflectors
when
in
normal
use.
7. SPECIAL
SPECIFICATIONS
(TESTS)
7.1.
Retro-reflecting devices must also satisfy the conditions as to dimensions and shape, and the
colorimetric, photometric, physical and mechanical requirements set forth in Annexes 5 to 11
and 13 to this Regulation. The test procedures are described in Annex 4 (Class IA, IIIA), Annex 14
(Class IVA) and Annex 16 (Class IB, IIIB).
7.2.
Depending on the nature of the materials of which the retro-reflecting devices and, in particular,
their optical units, are made, the competent authorities may authorise laboratories to omit certain
unnecessary tests, subject to the express reservation that such omission must be mentioned under
‘Remarks’ on the form notifying approval.
8. CONFORMITY
OF
PRODUCTION
The conformity of production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2), with the following requirements:
8.1. Retro-reflectors
approved
under
this
Regulation
shall
be
so
manufactured
as
to
conform
to
the
type
approved by meeting the requirements set forth in paragraphs 6 and 7 above.
8.2. The
minimum
requirements
for
conformity
of
production
control
procedures
set
forth
in
Annex
17 to this Regulation shall be complied with.
8.3.
The minimum requirements for sampling by an inspector set forth in Annex 18 to this Regulation
shall be complied with.
8.4. The
authority
which
has
granted
type
approval
may
at
any
time
verify
the
conformity
control
methods applied in each production facility. The normal frequency of these verifications shall be
once every 2 years.
9. PENALTIES
FOR
NON-CONFORMITY
OF
PRODUCTION
9.1. The
approval
granted
for
a
type
of
retro-reflecting
device
may
be
withdrawn
if
the
requirements
are
not complied with or if a retro-reflecting device bearing the approval mark does not conform to
the type approved.

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9.2. If
a
Contracting
Party
to
the
Agreement
applying
this
Regulation
withdraws
an
approval
it
has
previously granted, it shall forthwith so notify the other Contracting Parties applying this Regu
lation by means of a communication form conforming to the model in Annex 2 to this Regulation.
10. PRODUCTION
DEFINITELY
DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of retro-reflecting device
approved in accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication, that authority shall inform thereof the other
Parties to the 1958 Agreement applying this Regulation by means of a communication form
conforming to the model in Annex 2 to this Regulation.
11.
NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR CONDUCTING APPROVAL TESTS,
AND OF ADMINISTRATIVE DEPARTMENTS
The Contracting Parties to the Agreement applying this Regulation shall communicate to the
United Nations Secretariat the names and addresses of the technical services responsible for
conducting approval tests and of the administrative departments which grant approval and to
which forms certifying approval or extension or refusal or withdrawal of approval, issued in
other countries, are to be sent.
12. TRANSITIONAL
PROVISIONS
The Contracting Parties applying this Regulation:
12.1. shall
continue
to
recognise
approvals
issued
for
the
former
Classes
I,
II
and
III
in
respect
of
the
fitting of retro-reflecting devices intended as replacement for vehicles in use;
12.2. may issue approvals for Classes I and II on the basis of the original Regulation (document
E/ECE/324-E/ECE/TRANS/505/Add.2 of 23 September 1964) provided that the devices are
intended as replacements for fitting to vehicles in use and that it would not be technically
feasible for the devices in question to satisfy the photometric requirements for Class IA;
12.3. may prohibit the fitting of retro-reflecting devices which do not meet the requirements of this
Regulation:
12.3.1. on vehicles for which type approval or individual approval was issued on or after 20 March 1984;
12.3.2. on vehicles first brought into use on or after 20 March 1985.

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ANNEX 1
RETRO-REFLECTING DEVICES
Symbols and units
A = Area of the illuminating surface of the retro-reflecting device (cm 2 )
C = Centre of reference
NC = Axis of reference
Rr = Receiver, observer or measuring device
Cr = Centre of receiver
r = Diameter of receiver Rr if circular (cm)
Se = Source of illumination
Cs = Centre of source of illumination
s = Diameter of source of illumination (cm)
De = Distance from centre Cs to centre C (m)
D'e = Distance from centre Cr to centre C (m)
Note: In general, De and D'e are very nearly the same and under normal conditions of observation it may be assumed
that De = D'e.
D = Observation distance from and from beyond which the illuminating surface appears to be continuous
α =
Angle
of
divergence
β = Illumination angle. With respect to the line CsC which is always considered to be horizontal, this angle is prefixed
by the signs – (left), + (right), + (up) or – (down), according to the position of the source Se in relation to the axis
NC, as seen when looking towards the retro-reflecting device. For any direction defined by two angles, vertical and
horizontal, the vertical angle is always given first.
γ = Angular diameter of the measuring device Rr as seen from point C
δ = Angular diameter of the source Se as seen from point C
ε = Angle of rotation. This angle is positive when the rotation is clockwise as seen when looking towards the
illuminating surface. If the retro-reflecting device is marked ‘TOP’, the position thus indicated is taken as the origin.
E =
Illumination
of
the
retro-reflecting
device
(lux)
CIL = Coefficient of luminous intensity (millicandelas/lux)
Angles are expressed in degrees and minutes.

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RETRO-REFLECTORS
Symbols
ELEVATION

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ANNEX 2
COMMUNICATION
(Maximum format: A4 (210 × 297 mm))

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ANNEX 3
EXAMPLES OF APPROVAL MARKS
Figure 1
(Marking for single lamps)
MODEL A
MODEL B
a = 4 mm min.
MODEL C
a = 4 mm min.

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Note: The above approval number must be placed close to, but in any position in relation to, the circle surrounding the
letter ‘E’. The digits constituting the approval number must face the same way as the ‘E’. The group of symbols
indicating the class must be diametrically opposite the approval number. The competent authorities shall avoid
using approval numbers IA, IB, IIIA, IIIB and IVA which might be confused with the class symbols IA, IB, IIIA, IIIB
and IVA.
These sketches show various possible arrangements and are given as examples only.
The above approval mark affixed to a retro-reflecting device shows that the type of device concerned has been
approved in the Netherlands (E4) under approval number 02216. The approval number shows that approval was
granted in accordance with the requirements of the Regulation as modified by the 02 series of amendments.
Figure 2
(Simplified marking for grouped, combined or reciprocally incorporated lamps)
MODEL D
MODEL E
MODEL F

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Note: The three examples of approval marks, models D, E and F, represent three possible variants of the marking of a
lighting device when two or more lamps are part of the same unit of grouped, combined or reciprocally incor
porated lamps. This approval mark shows that the device was approved in the Netherlands (E4) under approval
number 3333 and comprising:
A retro-reflector of Class IA approved in accordance with the 02 series of amendments to Regulation No 3;
A rear direction indicator of category 2a approved in accordance with Regulation No 6 in its original form;
A red rear position lamp (R) approved in accordance with the 01 series of amendments to Regulation No 7;
A rear fog lamp (F) approved in accordance with Regulation No 38 in its original form;
A reversing lamp (AR) approved in accordance with Regulation No 23 in its original form;
A stop lamp with two levels of illumination (S2) approved in accordance with the 01 series of amendments to
Regulation No 7.

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ANNEX 4
TEST PROCEDURE — CLASS IA AND CLASS IIIA
1. The
applicant
shall
submit
for
approval
10
samples
which
shall
be
tested
in
the
chronological
order
indicated
in
Annex 12.
2. After verification of the general specifications (paragraph 6 of the Regulation) and the specifications of shape and
dimensions (Annex 5), the 10 samples shall be subjected to the heat resistance test described in Annex 10 to this
Regulation and at least 1 hour after this test examined as to their colorimetric characteristics and CIL (Annex 7) for
an angle of divergence of 20’ and an illumination angle V = H = 0° or if necessary, in the position defined in Annex
7, paragraphs 4 and 4.1. The two retro-reflecting devices giving the minimum and maximum values shall then be
fully tested as shown in Annex 7. These two samples shall be kept by the laboratories for any further checks which
may be found necessary. The other eight samples shall be divided into four groups of two:
First group:
The two samples shall be subjected successively to the water penetration test (Annex 8, paragraph
1.1) and then, if this test is satisfactory, to the tests for resistance to fuels and lubricants (Annex 8,
paragraphs 3 and 4).
Second group: The two samples shall, if necessary, be subjected to the corrosion test (Annex 8, paragraph 2), and
then to the abrasive-strength test of the rear face of the retro-reflecting device (Annex 8,
paragraph 5).
Third group: The two samples shall be subjected to the test for stability in time of the optical properties of
retro-reflecting device (Annex 9).
Fourth group: The two samples shall be subjected to the colour-fastness test (Annex 11).
3. After undergoing the tests referred to in the above paragraph, the retro-reflecting devices in each group must have:
3.1. A colour which satisfies the conditions laid down in Annex 6. This shall be verified by a qualitative method and, in
case of doubt, confirmed by a quantitative method.
3.2. a CIL which satisfies the conditions laid down in Annex 7. The verification shall be performed only for an angle of
divergence of 20’ and an illumination angle of V = H = 0° or, if necessary, in the position specified in Annex 7,
paragraphs 4 and 4.1.

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ANNEX 5
SPECIFICATIONS OF SHAPE AND DIMENSIONS
1. SHAPE
AND
DIMENSIONS
OF
RETRO-REFLECTING
DEVICES
IN
CLASS
IA
OR
IB
1.1. The shape of the illuminating surfaces must be simple, and not easily confused at normal observation distances,
with a letter, a digit or a triangle.
1.2. The preceding paragraph notwithstanding, a shape resembling the letters or digits of simple form O, I, U or 8 is
permissible.
2.
SHAPE AND DIMENSIONS OF RETRO-REFLECTING DEVICES IN CLASSES IIIA AND IIIB (see Appendix to this
Annex)
2.1. The
illuminating
surfaces
of
retro-reflecting
devices
in
Classes
IIIA
and
IIIB
must
have
the
shape
or
an
equilateral
triangle. If the word ‘TOP’ is inscribed in one corner, the apex of that corner must be directed upwards.
2.2. The illuminating surface may or may not have at its centre a triangular, non-retro-reflecting area, with sides parallel
to those of the outer triangle.
2.3. The illuminating surface may or may not be continuous. In any case, the shortest distance between two adjacent
retro-reflecting optical units must not exceed 15 mm.
2.4. The illuminating surface of a retro-reflecting device shall be considered to be continuous if the edges of the
illuminating surfaces of adjacent separate optical units are parallel and if the said optical units are evenly
distributed over the whole solid surface of the triangle.
2.5. If
the
illuminated
surface
is
not
continuous,
the
number
of
separate
retro-reflecting
optical
units
including
the
corner units shall not be less than four on each side of the triangle.
2.5.1. The separate retro-reflecting optical units shall not be replaceable unless they consist of approved retro-reflecting
devices in Class IA.
2.6. The
outside
edges
of
the
illuminating
surfaces
of
triangular
retro-reflecting
devices
in
Classes
IIIA
and
IIIB
shall
be
between 150 and 200 mm long. In the case of devices of hollow-triangle type, the width of the sides, measured at
right angles to the latter, shall be equal to at least 20 per cent of the effective length between the extremities of the
illuminating surface.
3. SHAPE
AND
DIMENSIONS
OF
RETRO-REFLECTING
DEVICES
IN
CLASS
IVA
3.1. The
shape
of
the
light
emitting
surfaces
must
be
simple
and
not
easily
confused
at
normal
observation
distances
with a letter, a digit or a triangle. However, a shape resembling the letters and digits of simple form, O, I, U and 8
is permissible.
3.2. The light emitting surface of the retro-reflecting device must be at least 25 cm 2 .
4. Compliance
with
the
above
specifications
shall
be
verified
by
visual
inspection.

---

EN
6.12.2011 Official
Journal
of
the
European
Union L
323/15
Appendix
Retro-reflectors for trailers — Classes IIIA and IIIB
Note: These sketches are for illustration purposes only.

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L 323/16
EN
Official Journal of the European Union
6.12.2011
ANNEX 6
COLORIMETRIC SPECIFICATIONS
1. These
specifications
shall
apply
only
to
clear,
red
or
amber
retro-reflecting
devices.
1.1. Retro-reflecting devices may consist of a combined retro-reflecting optical unit and filter, which must be so designed
that they cannot be separated under normal conditions of use.
1.2. The colouring of retro-reflecting optical units and filters by means of paint or varnish is not permitted.
2. When
the
retro-reflecting
device
is
illuminated
by
CIE
standard
illuminant
A,
with
an
angle
of
divergence
of
1/3 degrees and an illumination angle of V = H = 0 degrees, or, if this produces a colourless surface reflection,
an angle V = ± 5 degrees, H = 0 degrees, the trichromatic coordinates of the reflected luminous flux must be within
the limits according to paragraph 2.30 of Regulation No 48.
3. Clear
retro-reflecting
devices
must
not
produce
a
selective
reflection,
that
is
to
say,
the
trichromatic
coordinates
‘x’
and ‘y’ of the standard illuminant ‘A’ used to illuminate the retro-reflecting device must not undergo a change of
more than 0,01 after reflection by the retro-reflecting device.

---

EN
6.12.2011 Official
Journal
of
the
European
Union L
323/17
ANNEX 7
PHOTOMETRIC SPECIFICATIONS
1.
When applying for approval, the applicant shall specify one or more or a range of axis of reference, corresponding
to the illumination angle V = H = 0° in the table of coefficients of luminous intensity (CIL).
In the case where more than one or a range of different axis of reference are specified by the manufacturer, the
photometric measurements shall be repeated making reference each time to a different axis of reference or to the
extreme axis of reference of the range specified by the manufacturer.
2.
For photometric measurements, only the illuminating surface defined by the planes contiguous to the outermost
parts of the optical system of the retro-reflecting device as indicated by the manufacturer and contained within a
circle of 200 mm diameter for Class IA or IB shall be considered, and the illuminating surface itself shall be limited
to 100 cm 2 though the surfaces of the retro-reflecting optical units need not necessarily attain this area. The
manufacturer shall specify the perimeter of the area to be used. In the case of Class IIIA, Class IIIB and Class IVA,
the whole of the illuminating surfaces shall be considered without limitation as to size.
3. CIL
values
3.1. Class IA, Class IB, Class IIIA and Class IIIB
3.1.1. The CIL values for red retro-reflecting devices must be at least equal to those in the table below, expressed in
millicandelas per lux, for the angles of divergence and illumination shown.
(in degrees)
Illumination angles
Class
Angle of divergence
α
Vertical V
0 ±
10 ±
5
Horizontal H
0
0 ±
20
IA, IB 20′ 300 200 100
1°30′
5 2,8 2,5
IIIA, IIIB 20′ 450 200 150
1°30′ 12
8
8
CIL values lower than those shown in the last two columns of the above table are not permissible within the solid
angle having the reference centre as its apex and bounded by the planes intersecting along the following lines:
(V = ± 10°, H = 0°)
(V = ± 5°, H = ± 20°).
3.1.2. CIL values for amber retro-reflecting devices in Class IA or IB must be at least equal to those in the table of
paragraph 3.1.1 above multiplied by the coefficient 2,5.
3.1.3. CIL values for colourless retro-reflecting devices in Class IA or IB must be at least equal to those in the table of
paragraph 3.1.1 above multiplied by the coefficient 4.
3.2. For
devices
of
Class
IVA
the
CIL
values
must
be
at
least
equal
to
those
in
the
table
below,
expressed
in
millicandelas per lux, for the angles of divergence and illumination shown.
(in degrees)
Illumination angles
Colour
Angle of divergence
α
Vertical V
0 ±
10
0
0
0
0
Horizontal H
0
0 ±
20 ±
30 ±
40 ±
50
White 20′ 1
800 1
200 610 540 470 400
1°30′ 34 24 15 15 15 15

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L 323/18
EN
Official Journal of the European Union
6.12.2011
(in degrees)
Illumination angles
Colour
Angle of divergence
α
Vertical V
0 ±
10
0
0
0
0
Horizontal H
0
0 ±
20 ±
30 ±
40 ±
50
Amber 20′ 1
125 750 380 335 290 250
1°30′ 21 15 10 10 10 10
Red 20′ 450 300 150 135 115 100
1°30′
9
6
4
4
4
4
4. When
the
CIL
of
a
retro-reflecting
device
is
measured
for
an
angle
β of V = H = 0°, it shall be ascertained whether
any mirror effect is produced by slightly turning the device. If there is any such effect, a reading shall be taken with
an angle β of V = ± 5°, H = 0°. The position adopted shall be that corresponding to the minimum CIL for one of
these positions.
4.1. With
an
illumination
angle
β of V = H = 0°, or the angle specified in paragraph 4 above, and an angle of
divergence of 20′, retro-reflecting devices which are not marked ‘TOP’ shall be rotated about their axes of
reference to the position of minimum CIL, which must conform to the value specified in paragraph 3 above.
When the CIL is measured for the other angles of illumination and divergence, the retro-reflecting device shall be
placed in the position corresponding to this value of ε. If the specified values are not attained, the device may be
rotated about its axis of reference ± 5° from that position.
4.2. With
an
illumination
angle
β of V = H = 0°, or the angle specified in paragraph 4 above, and an angle of
divergence of 20′, retro-reflecting devices marked ‘TOP’ shall be rotated about their axes ± 5°. The CIL must
not fall below the prescribed value in any position assumed by the device during this rotation.
4.3. If
for
the
direction
V
=
H
=
0°,
and
for
ε = 0° the CIL exceeds the specified value by 50 per cent or more, all
measurements for all angles of illumination and divergence shall be made for ε = 0°.

---

EN
6.12.2011 Official
Journal
of
the
European
Union L
323/19
ANNEX 8
RESISTANCE TO EXTERNAL AGENTS
1. RESISTANCE
TO
WATER
AND
DIRT
PENETRATION
1.1. Water
submersion
test
1.1.1.
Retro-reflecting devices whether part of a lamp or not, shall be stripped of all removable parts and immersed
for 10 minutes in water at a temperature of 50 ± 5 °C, the highest point of the upper part of the illuminating
surface being 20 mm below the surface of the water. This test shall be repeated after turning the retro-
reflecting device through 180°, so that the illuminating surface is at the bottom and the rear face is
covered by about 20 mm of water. These optical units shall then be immediately immersed in the same
conditions in water at a temperature of 25 ± 5 °C.
1.1.2.
No water shall penetrate to the reflecting surface of the retro-reflecting optical unit. If visual inspection clearly
reveals the presence of water, the device shall not be considered to have passed the test.
1.1.3.
If visual inspection does not reveal the presence of water or in case of doubt, the CIL shall be measured by the
method described in Annex 4, paragraph 3.2, or Annex 14, paragraph 4.2, the retro-reflecting device being
first lightly shaken to remove excess water from the outside.
1.2. Alternative
test
procedure
for
Classes
IB
and
IIIB
devices
As an alternative, at the request of the manufacturer, the following test (moisture and dust test) shall be applied
instead of the submersion-test specified in paragraph 1.1 above.
1.2.1. Moisture
test
The test evaluates the ability of the sample device to resist moisture penetration from a water spray and
determines the drainage capability of those devices with drain holes or other exposed openings in the device.
1.2.1.1. Water
spray
test
equipment
A water spray cabinet with the following characteristics shall be used:
1.2.1.1.1. Cabinet
The cabinet shall be equipped with a nozzle(s) which provides a solid cone water spray of sufficient angle to
completely cover the sample device. The centreline of the nozzle(s) shall be directed downward at an angle of
45° ± 5° to the vertical axis of a rotating test platform.
1.2.1.1.2. Rotating test platform
The rotating test platform shall have a minimum diameter of 140 mm and rotate about a vertical axis in the
centre of the cabinet.
1.2.1.1.3. Precipitation rate
The precipitation rate of the water spray at the device shall be 2,5 (+ 1,6/– 0) mm/min as measured with a
vertical cylindrical collector centred on the vertical axis of the rotating test platform. The height of the collector
shall be 100 mm and the inside diameter shall be a minimum of 140 mm.
1.2.1.2. Water
spray
test
procedure
A sample device mounted on a test fixture, with initial CIL measured and recorded shall be subjected to a water
spray as follows:
1.2.1.2.1. Device openings
All drain holes and other openings shall remain open. Drain wicks, when used, shall be tested in the device.

---

L 323/20
EN
Official Journal of the European Union
6.12.2011
1.2.1.2.2. Rotational speed
The device shall be rotated about its vertical axis at a rate of 4,0 ± 0,5 min –1 .
1.2.1.2.3. If the retro-reflector is reciprocally incorporated or grouped with signalling or lighting functions, these
functions shall be operated at design voltage according to a cycle of 5 min ON (in flashing mode, where
appropriate), 55 min OFF.
1.2.1.2.4. Test duration
The water spray test shall last 12 h (12 cycles of 5/55 min).
1.2.1.2.5. Drain period
The rotation and the water spray shall be turned OFF and the device allowed to drain for 1 h with the cabinet
door closed.
1.2.1.2.6. Sample evaluation
Upon completion of the drain period. The interior of the device shall be observed for moisture accumulation.
No standing pool of water shall be allowed to be formed, or which can be formed by tapping or tilting the
device. The CIL shall be measured according to the method specified in Annex 4 paragraph 3.2 after having
dried the exterior of the device with a dry cotton cloth.
1.2.2. Dust
exposure
test
This test evaluates the ability of the sample device to resist dust penetration which could significantly affect the
photometric output of the retro-reflector.
1.2.2.1. Dust
exposure
test
equipment
The following equipment shall be used to test for dust exposure:
1.2.2.1.1. Dust exposure test chamber
The interior of the test chamber shall be cubical in shape in size 0,9 to 1,5 m per side. The bottom may be
‘hopper shaped’ to aid in collecting the dust. The internal chamber volume, not including a ‘hopper shaped’
bottom shall be 2 m 3 maximum and shall be charged with 3 to 5 kg of the test dust. The chamber shall have
the capability of agitating the test dust by means of compressed air or blower fans in such a way that the dust
is diffused throughout the chamber.
1.2.2.1.2. The dust
The test dust used shall be fine powdered cement in accordance with standard ASTM C 150-84 ( 1 ).
1.2.2.2. Dust
exposure
test
procedure
A sample device, mounted on a test fixture, with the initial CIL measured and recorded, shall be exposed to
dust as follows:
1.2.2.2.1. Device openings
All drain holes and other openings shall remain open. Drain wicks, when used, shall be tested in the device.
1.2.2.2.2. Dust exposure
The mounted device shall be placed in the dust chamber no closer than 150 mm from a wall. Devices with a
length exceeding 600 mm shall be horizontally centred in the test chamber. The test dust shall be agitated as
completely as possible by compressed air or blower(s) at intervals of 15 min for a period of 2 to 15 s for the
duration of 5 hours. The dust shall be allowed to settle between the agitation periods.
1.2.2.2.3. Measured sample evaluation
Upon completion of the dust exposure test, the exterior of the device shall be cleaned and dried with a dry
cotton cloth and the CIL measured according to the method specified in Annex 4, paragraph 3.2.
( 1 ) American Society for Testing and Materials.

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/21
2. RESISTANCE
TO
CORROSION
2.1. Retro-reflecting
devices
must
be
so
designed
that
they
retain
the
prescribed
photometric
and
colorimetric
characteristics despite the humidity and corrosive influences to which they are normally exposed. The resistance
of the front surface to tarnishing and of the protection of the rear face to deterioration shall be checked,
particularly when an essential metal component seems liable to be attacked.
2.2.
The retro-reflecting device, or the lamp if the device is combined with a light, shall be stripped of all removable
parts and subjected to the action of a saline mist for a period of 50 hours, comprising two periods of exposure
of 24 hours each, separated by an interval of 2 hours during which the sample is allowed to dry.
2.3.
The saline mist shall be produced by atomising, at a temperature of 35 ± 2 °C, a saline solution obtained by
dissolving 20 ± 2 parts by weight of sodium chloride in 80 parts of distilled water containing not more than
0,02 per cent of impurities.
2.4.
Immediately after completion of the test, the sample must not show signs of excessive corrosion liable to
impair the efficiency of the device.
3. RESISTANCE
TO
FUELS
The outer surface of the retro-reflecting device and, in particular, of the illuminating surface, shall be lightly
wiped with a cotton cloth soaked in a mixture of 70 vol. per cent of n-heptane and 30 vol. per cent of toluol.
After about 5 minutes, the surface shall be inspected visually. It must not show any apparent surface changes,
except that slight surface cracks will not be objected to.
4. RESISTANCE
TO
LUBRICATING
OILS
The outer surface of the retro-reflecting device and, in particular, the illuminating surface, shall be lightly wiped
with a cotton cloth soaked in a detergent lubricating oil. After about 5 minutes, the surface shall be cleaned.
The CIL shall then be measured (Annex 4, paragraph 3.2 or Annex 14, paragraph 4.2).
5. RESISTANCE
OF
THE
ACCESSIBLE
REAR
FACE
OF
MIRROR-BACKED
RETRO-REFLECTING
DEVICES
5.1.
After having brushed the rear face of the retro-reflecting device with a hard nylon brush, a cotton cloth soaked
in the mixture, defined in paragraph 3 shall be applied to the said rear face for 1 minute. The cotton cloth is
then removed and the retro-reflecting device left to dry.
5.2.
As soon as evaporation is completed, an abrasion test shall be made by brushing the rear face with the same
nylon brush as before.
5.3.
The CIL shall then be measured (Annex 4, paragraph 3.2 or Annex 14, paragraph 4.2) after the whole surface
of the mirror-backed rear face has been covered with Indian ink.

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L 323/22
EN
Official Journal of the European Union
6.12.2011
ANNEX 9
STABILITY IN TIME OF THE OPTICAL PROPERTIES ( 1 ) OF RETRO-REFLECTING DEVICES
1. The authority which granted approval shall have the right to check the stability in time of the optical properties of a
type of retro-reflecting device in service.
2. The competent authorities of countries other than the country in which approval was granted may carry out similar
checks in their territory. If a type of retro-reflector in use exhibits a systematic defect, the said authorities shall transmit
any components removed for examination to the authority which granted approval, with a request for its opinion.
3. In the absence of other criteria, the concept of ‘systematic defect’ of a type of retro-reflector in use shall be interpreted
in conformity with the intention of paragraph 6.1 of this Regulation.
___________
( 1 ) Despite the importance of tests to check the stability in time of the optical properties of retro-reflecting devices, it is in the present state
of the art not yet possible to assess this stability by laboratory tests of limited duration.
ANNEX 10
RESISTANCE TO HEAT
1. The retro-reflecting device shall be kept for 48 consecutive hours in a dry atmosphere at a temperature of 65 ± 2 °C.
2. After this test, no cracking or appreciable distortion of the retro-reflecting device and, in particular, of its optical
component must be visible.
ANNEX 11
COLOUR-FASTNESS ( 1 )
1. The authority which granted approval shall have the right to check the colour-fastness of a type of retro-reflecting
device in service.
2. The competent authorities of countries other than the country in which approval was granted may carry out similar
checks in their territory. If a type of retro-reflector in use exhibits a systematic defect, the said authorities shall transmit
any components removed for examination to the authority which granted approval, with a request for its opinion.
3. In the absence of other criteria, the concept ‘systematic defect’ of a type of retro-reflector in use shall be interpreted in
conformity with the intention of paragraph 9.1 of this Regulation.
___________
( 1 ) Despite the importance of tests to check the colour-fastness of retro-reflecting devices, it is in the present state of the art not yet
possible to assess colour-fastness by laboratory tests of limited duration.

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/23
ANNEX 12
CHRONOLOGICAL ORDER OF TESTS
Samples
Number Number of
of Annex paragraph
Tests
a
b
c
d
e
f
g
h
i
j
— 6
( 1 ) General
specifications:
visual
inspection
x
x
x
x
x
x
x
x
x
x
5
— Shapes
and
dimensions:
visual
inspection
x
x
x
x
x
x
x
x
x
x
10
— Heat: 48 h at 65 ± 2 °C
x
x
x
x
x
x
x
x
x
x
Visual inspection for distortion
x
x
x
x
x
x
x
x
x
x
6
— Colorimetry:
visual
inspection
x
x
x
x
x
x
x
x
x
x
Trichromatic coordinates in case of doubt
x
7
— Photometry:
limited
to
20′ and V = H = 0°
x
x
x
x
x
x
x
x
x
x
7
3 Complete
photometry
x
x
8
1 Water: 10 min in normal position
x
x
10 min in inverted position
x
x
visual inspection
x
x
4 3.1 Colorimetry:
visual
inspection
x
x
Trichromatic coordinates in case of doubt
x
x
4 3.2 Photometry:
limited
to
20′ and V = H = 0°
x
x
8
3 Motor
fuels: 5 min
x
x
visual inspection
x
x
8
4 Oils: 5 min
x
x
visual inspection
x
x
4 3.1 Colorimetry:
visual
inspection
Trichromatic coordinates in case of doubt
x
x
4 3.2 Photometry:
limited
to
20′ and V = H = 0°
x
x
8
2 Corrosion: 24 hours
x
x
2 hours interval
x
x
24 hours
x
x
visual inspection
x
x
8
5 Rear
face: 1 min
x
x
visual inspection
x
x
4 3.1 Colorimetry:
visual
inspection
x
x
Trichromatic coordinates in case of doubt
x
x
4 3.2 Photometry:
limited
to
20′ and V = H = 0°
x
x
9
— Stability
in
time

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L 323/24
EN
Official Journal of the European Union
6.12.2011
Samples
Number Number of
of Annex paragraph
Tests
a
b
c
d
e
f
g
h
i
j
4 3.1 Colorimetry: Visual inspection or trichromatic
coordinates
4 3.2 Photometry:
limited
to
20′ and V = H = 0°
11
— Colour-fastness
4 3.1 Colorimetry: Visual inspection or trichromatic
coordinates
4 3.2 Photometry:
limited
to
20′ and V = H = 0°
4
2 Deposit
of
samples
with
administration
x
x
( 1 ) of the Regulation.

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/25
ANNEX 13
RESISTANCE TO IMPACT — CLASS IVA
1. The retro-reflecting device shall be mounted in a manner similar to the way in which it is mounted on the vehicle, but
with the lens faced horizontal and directed upwards.
2. Drop a 13 mm diameter polished solid steel ball, once, vertically onto the central part of the lens from a height of
0,76 m. The ball may be guided but not restricted in free fall.
3. When a retro-reflecting device is tested at room temperature with this method, the lens shall not crack.
ANNEX 14
TEST PROCEDURE — CLASS IVA
1. The
applicant
shall
submit
for
approval
10
samples
which
shall
be
tested
in
the
chronological
order
indicated
in
Annex 15.
2. After verification of the specifications in paragraphs 6.1 to 6.5 and the specifications of shape and dimensions
(Annex 5), the 10 samples shall be subjected to the heat resistance test (Annex 10) and 1 hour minimum after this
test examined as to their colorimetric characteristics and CIL (Annex 7) for an angle of divergence of 20’ and an
illumination angle V = H = 0° or, if necessary, in the positions defined in Annex 7. The two retro-reflecting devices
giving the minimum and maximum values shall then be fully tested as shown in Annex 7. These two samples shall
be kept by the laboratories for any further checks which may be found necessary.
3. Four samples out of the remaining eight samples shall be selected at random and divided into two groups of two in
each group.
First group:
The two samples shall be subjected successively to the water-penetration resistance test (Annex 8,
paragraph 1) and then, if this test is satisfactory, to the tests for resistance to fuels and lubricating
oils (Annex 8, paragraphs 3 and 4).
Second group: The two samples shall, if relevant, be subjected to the corrosion test (Annex 8, paragraph 2), and
then to the abrasive-strength test of the rear face of the retro-reflecting device (Annex 8,
paragraph 5). These two samples shall also be subjected to the impact test (Annex 13).
4. After undergoing the tests referred to in the above paragraph, the retro-reflecting devices in each group must have:
4.1. A colour which satisfies the conditions laid down in Annex 6. This shall be verified by a qualitative method and, in
case of doubt, confirmed by a quantitative method;
4.2. A CIL which satisfies the conditions laid down in Annex 7. Verification shall be performed only for an angle of
divergence of 20’ and an illumination angle of V = H = 0° or, if necessary, in the positions specified in Annex 7.
5. The
four
remaining
samples
can
be
utilised,
if
necessary,
for
any
other
purpose.

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L 323/26
EN
Official Journal of the European Union
6.12.2011
ANNEX 15
CHRONOLOGICAL ORDER OF TESTS FOR CLASS IVA
Samples
Number of Number of
Annex
paragraph
Tests
a
b
c
d
e
f
g
h
i
j
— 6
( 1 ) General
specifications:
visual
inspection
x
x
x
x
x
x
x
x
x
x
5
— Shape
and
dimensions:
visual
inspection
x
x
x
x
x
x
x
x
x
x
10
— Heat: 48 h at 65 ± 20 °C
x
x
x
x
x
x
x
x
x
x
Visual inspection for distortion
x
x
x
x
x
x
x
x
x
x
6
— Colorimetry:
visual
inspection
x
x
x
x
x
x
x
x
x
x
Trichromatic coordinates in case of doubt
x
7
— Photometry:
limited
to
20′ and V = H = 0°
x
x
x
x
x
x
x
x
x
x
7
— Complete
photometry
x
x
8
1 Water: 10 min in normal position
x
x
10 min in inverted position
x
x
visual inspection
x
x
8
3 Motor
fuels: 5 min
x
x
visual inspection
x
x
8
4 Oils: 5 min
x
x
visual inspection
x
x
6
— Colorimetry:
visual
inspection
x
x
Trichromatic coordinates in case of doubt
x
x
7
— Photometry:
limited
to
20′ and V = H = 0°
x
x
8
2 Corrosion: 24 hours
x
x
2 hours’ interval
x
x
24 hours
x
x
visual inspection
x
x
8
5 Rear
face: 1 min
x
x
visual inspection
x
x
13
— Impact
x
x
visual inspection
x
x
6
— Colorimetry:
visual
inspection
x
x
Trichromatic coordinates in case of doubt
x
x
7
— Photometry:
limited
to
20′ and V = H = 0°
x
x
14
2 Deposit
of
samples
with
administration
x
x
( 1 ) of the Regulation.

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/27
ANNEX 16
TEST PROCEDURE FOR CLASSES IB AND IIIB DEVICES
Retro-reflecting devices of Classes IB and IIIB shall be tested according to the test procedures specified in Annex 4,
following the chronological order of tests given in Annex 12, with the exception of the test according to Annex 8,
paragraph 1, which for Classes IB and IIIB devices may be replaced by the test specified in Annex 8, paragraph 1.2.

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L 323/28
EN
Official Journal of the European Union
6.12.2011
ANNEX 17
MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES
1. GENERAL
1.1. The
conformity
requirements
shall
be
considered
satisfied
from
a
mechanical
and
geometric
standpoint,
if
the
differences do not exceed inevitable manufacturing deviations within the requirements of this Regulation.
1.2. With
respect
to
photometric
performances,
the
conformity
of
mass-produced
retro-reflectors
shall
not
be
contested if, when testing photometric performances of any retro-reflector chosen at random no measured
value deviates unfavourably by more than 20 per cent from the minimum values prescribed in this Regulation.
1.3. The
chromaticity
coordinates
shall
be
complied
with.
2. MINIMUM
REQUIREMENTS
FOR
VERIFICATION
OF
CONFORMITY
BY
THE
MANUFACTURER
For each type of retro-reflector the holder of the approval mark shall carry out at least the following tests, at
appropriate intervals. The tests shall be carried out in accordance with the provisions of this Regulation.
If any sampling shows non-conformity with regard to the type of test concerned, further samples shall be taken
and tested. The manufacturer shall take steps to ensure the conformity of the production concerned.
2.1. Nature
of
tests
Tests of conformity in this Regulation shall cover the photometric and colorimetric characteristics and the
resistance to penetration of water.
2.2. Methods
used
in
tests
2.2.1. Tests shall generally be carried out in accordance with the methods set out in this Regulation.
2.2.2. In any test of conformity carried out by the manufacturer, equivalent methods may be used with the consent of
the competent authority responsible for approval tests. The manufacturer is responsible for proving that the
applied methods are equivalent to those laid down in this Regulation.
2.2.3. The application of paragraphs 2.2.1 and 2.2.2 requires regular calibration of test apparatus and its correlation with
measurements made by a competent authority.
2.2.4. In all cases the reference methods shall be those of this Regulation, particularly for the purpose of administrative
verification and sampling.
2.3. Nature
of
sampling
Samples of retro-reflectors shall be selected at random from the production of a uniform batch. A uniform batch
means a set of retro-reflectors of the same type, defined according to the production methods of the manufacturer.
The assessment shall in general cover series production from individual factories. However, a manufacturer may
group together records concerning the same type from several factories, provided these operate under the same
quality system and quality management.
2.4. Measured
and
recorded
photometric
characteristics
The sampled retro-reflector shall be subjected to photometric measurements at the points and the chromaticity
coordinates provided for in the Regulation.
2.5. Criteria
governing
acceptability
The manufacturer is responsible for carrying out a statistical study of the test results and for defining, in
agreement with the competent authority, criteria governing the acceptability of his products in order to meet
the specifications laid down for the verification of conformity of products in paragraph 8.1 of this Regulation.
The criteria governing the acceptability shall be such that, with a confidence level of 95 per cent, the minimum
probability of passing a spot check in accordance with Annex 18 (first sampling) would be 0,95.

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/29
ANNEX 18
MINIMUM REQUIREMENTS FOR SAMPLING BY AN INSPECTOR
1. GENERAL
1.1.
The conformity requirements shall be considered satisfied from a mechanical and a geometric standpoint, in
accordance with the requirements of this Regulation, if any, if the differences do not exceed inevitable
manufacturing deviations.
1.2. With
respect
to
photometric
performance,
the
conformity
of
mass-produced
retro-reflectors
shall
not
be
contested if, when testing photometric performances of any retro-reflector chosen at random:
1.2.1. no
measured
value
deviates
unfavourably
by
more
than
20
per
cent
from
the
minimum
values
prescribed
in
this
Regulation.
1.2.2. Retro-reflectors
with
apparent
defects
are
disregarded.
1.3. The
chromaticity
coordinates
shall
be
complied
with.
2. FIRST
SAMPLING
In the first sampling four retro-reflectors are selected at random. The first sample of two is marked A, the second
sample of two is marked B.
2.1. The
conformity
is
not
contested
2.1.1. Following the sampling procedure shown in the Figure of this Annex the conformity of mass-produced
retro-reflectors shall not be contested if the deviation of the measured values of the retro-reflectors in the
unfavourable directions are:
2.1.1.1. sample A
A1: one retro-reflector 0
per
cent
one retro-reflector not more than 20
per
cent
A2: both retro-reflectors more than 0
per
cent
but not more than 20
per
cent
go to sample B
2.1.1.2. sample B
B1: both retro-reflectors 0
per
cent
2.2. The
conformity
is
contested
2.2.1. Following the sampling procedure shown in the Figure of this Annex the conformity of mass-produced
retro-reflectors shall be contested and the manufacturer requested to make his production meet the requirements
(alignment) if the deviations of the measured values of the retro-reflectors are:
2.2.1.1. sample A
A3: one retro-reflector not more than 20
per
cent
one retro-reflector more than 20
per
cent
but not more than 30
per
cent
2.2.1.2. sample B
B2: in the case of A2
one retro-reflector more than 0
per
cent
but not more than 20
per
cent
one retro-reflector not more than 20
per
cent
B3: in the case of A2
one retro-reflector 0
per
cent
one retro-reflector more than 20
per
cent
but not more than 30
per
cent

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L 323/30
EN
Official Journal of the European Union
6.12.2011
2.3. Approval
withdrawn
Conformity shall be contested and paragraph 9 applied if, following the sampling procedure in the Figure of this
Annex, the deviations of the measured values of the retro-reflectors are:
2.3.1. sample
A
A4: one retro-reflector not more than 20
per
cent
one retro-reflector more than 30
per
cent
A5: both retro-reflectors more than 20
per
cent
2.3.2. sample
B
B4: in the case of A2
one retro-reflector more than 0
per
cent
but not more than 20
per
cent
one retro-reflector more than 20
per
cent
B5: in the case of A2
both retro-reflectors more than 20
per
cent
B6: in the case of A2
one retro-reflector 0
per
cent
one retro-reflector more than 30
per
cent
3. REPEATED
SAMPLING
In the cases of A3, B2, B3 a repeated sampling, third sample C of two retro-reflectors and fourth sample D of
two retro-reflectors, selected from stock manufactured after alignment, is necessary within 2 months’s time after
the notification.
3.1. The
conformity
is
not
contested
3.1.1. Following the sampling procedure shown in the Figure of this Annex the conformity of mass-produced
retro-reflectors shall not be contested if the deviations of the measured values of the retro-reflectors are:
3.1.1.1. sample C
C1: one retro-reflector 0
per
cent
one retro-reflector not more than 20
per
cent
C2: both retro-reflectors more than 0
per
cent
but not more than 20
per
cent
go to sample D
3.1.1.2. sample D
D1: in the case of C2
both retro-reflectors 0
per
cent
3.2. The
conformity
is
contested
3.2.1. Following the sampling procedure shown in the Figure of this Annex the conformity of mass-produced
retro-reflectors shall be contested and the manufacturer requested to make his production meet the requirements
(alignment) if the deviations of the measured values of the retro-reflectors are:
3.2.1.1. sample D
D2: in the case of C2
one retro-reflector more than 0
per
cent
but not more than 20
per
cent
one retro-reflector not more than 20
per
cent
3.3. Approval
withdrawn
Conformity shall be contested and paragraph 9 applied if, following the sampling procedure in the Figure of this
Annex, the deviations of the measured values of the retro-reflectors are:
3.3.1. sample
C
C3: one retro-reflector not more than 20
per
cent
one retro-reflector more than 20
per
cent
C4: both retro-reflectors more than 20
per
cent

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/31
3.3.2. sample
D
D3: in the case of C2
one retro-reflector 0 or more than 0
per
cent
one retro-reflector more than 20
per
cent
4. RESISTANCE
TO
PENETRATION
OF
WATER
With respect to the verification of the resistance to penetration of water, the following procedure shall be
applied:
One of the retro-reflectors of sample A, after sampling procedure in the Figure of this Annex, shall be tested
according to the procedure described in paragraph 1 of Annex 8 respectively paragraph 3 of Annex 14 for Class
IVA reflectors.
The retro-reflectors shall be considered as acceptable if the test has been passed.
However, if the test on sample A is not complied with, the two retro-reflectors of sample B shall be subjected to
the same procedure and both shall pass the test.

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L 323/32
EN
Official Journal of the European Union
6.12.2011
Figure

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