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6.12.2011 Official
Journal
of
the
European
Union L
323/33
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 28 of the Economic Commission for Europe of the United Nations (UN/ECE) —
Uniform provisions concerning the approval of audible warning devices and of motor vehicles with
regard to their audible signals
Incorporating all valid text up to:
Supplement 3 to the original version of the Regulation — Date of entry into force: 28 December 2000
CONTENTS
REGULATION
1. Scope
I. AUDIBLE WARNING DEVICES
2. Definitions
3. Application for approval
4. Markings
5. Approval
6. Specifications
7. Modification of the type of the audible warning device and extension of approval
8. Conformity of production
9. Penalties for non-conformity of production
10. Production discontinued
II. AUDIBLE SIGNALS OF MOTOR VEHICLES
11. Definitions
12. Application for approval
13. Approval
14. Specifications
15. Modifications of vehicle type and extension of approval
16. Conformity of production
17. Penalties for non-conformity of production
18. Names and addresses of the technical services conducting approval tests and of administrative
departments
ANNEXES
Annex 1 — Communication concerning the approval (or refusal or withdrawal of approval or production
definitely discontinued or extension of approval) of a type of audible warning device for
motor vehicles, pursuant to Regulation No 28
Annex 2 — Communication concerning the approval (or refusal or withdrawal of approval or production
definitely discontinued or extension of approval) of a vehicle type with regard to its audible
signals pursuant to Regulation No 28

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Annex 3 — I. Arrangement of the approval mark of the audible warning device
II. Arrangement of the approval mark of a vehicle with regard to its audible signals
1. SCOPE
This Regulation applies to:
1.1. audible
warning
devices
(AWD)
( 1 ), supplied with direct or alternating current or compressed air,
which are intended for fitting to motor vehicles of categories L3 to 5, M and N, excluding mopeds
(categories L1 and L2) ( 2 );
1.2. the
audible
signals
( 3 ) of motor vehicles listed in 1.1.
I. AUDIBLE WARNING DEVICES
2. DEFINITIONS
For the purposes of this Regulation, audible warning devices (AWD) of different ‘types’ shall be
understood to mean devices essentially different from one another with respect to such matters as:
2.1. trade
name
or
mark;
2.2. principles
of
operation;
2.3 type
of
electrical
supply
(direct
or
alternating
current);
2.4. outer
shape
of
case;
2.5. shape
and
dimensions
of
diaphragm(s);
2.6. shape
or
kind
of
sound
outlet(s);
2.7. rated
sound
frequency
or
frequencies;
2.8. rated
supply
voltage;
2.9.
for devices supplied directly from an external compressed air source, rated operating pressure.
2.10. The
AWD
is
principally
intended
for:
2.10.1. motor cycles of a power less than or equal to 7 kW (class I);
2.10.2. vehicles of categories M and N and motor cycles of a power greater than 7 kW (class II).
3. APPLICATION
FOR
APPROVAL
3.1.
The application for approval of a type of audible warning device shall be submitted by the holder
of the trade name or mark or by his duly accredited representative.
3.2.
It shall be accompanied by the following documents, in triplicate, giving the following particulars:
3.2.1. a description of the type of audible warning device, paying particular attention to the points
mentioned in paragraph 2;
3.2.2. a
drawing
showing,
inter
alia,
the
warning
device
in
cross
section;
3.2.3. a list of the components used in manufacture, duly identified, with an indication of the materials
used;
3.2.4. detailed drawings of all the components used in manufacture. The drawings shall show the place
provided for the approval number in relation to the circle of the approval mark.
( 1 ) An AWD consisting of several sound outlets activated by a single power unit shall be regarded as an AWD.
( 2 ) As defined in the Consolidated Resolution (R.E.3).
( 3 ) An AWD consisting of several units, each emitting a sound signal and operated simultaneously by the actuation of a
single control shall be regarded as an audible warning system.

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3.3. In
addition,
the
application
for
approval
shall
be
accompanied
by
two
samples
of
the
type
of
warning device.
3.4. The
competent
authority
shall
verify
the
existence
of
satisfactory
arrangements
for
ensuring
effective control of the conformity of production before type approval is granted.
4. MARKINGS
4.1.
The samples of the audible warning devices submitted for approval shall bear the manufacturer's
trade name or mark; this mark must be clearly legible and indelible.
4.2.
Each sample shall have a space of adequate dimensions for the approval mark; this space shall be
indicated in the drawing referred to in paragraph 3.2.2.
5. APPROVAL
5.1.
If the samples submitted for approval conform to the provisions of paragraphs 6 and 7 below,
approval for this type of warning device shall be granted.
5.2.
An approval number shall be assigned to each type approved. Its first two digits (at present 00 for
the Regulation in its original form) shall indicate the series of amendments incorporating the most
recent major technical amendments made to the Regulation at the time of issue of the approval.
The same Contracting Party may not assign this number to another type of audible warning device.
5.3. The
same
approval
number
may
be
assigned
to
types
of
warning
device
differing
only
with
respect
to rated voltage, rated frequency or frequencies or, for the devices mentioned in paragraph 2.8
above, rated operating pressure.
5.4.
Notice of approval or refusal or extension or withdrawal of approval or production definitely
discontinued of a type of warning device pursuant to this Regulation shall be communicated to the
Parties to the Agreement applying this Regulation by means of a form conforming to the model in
Annex 1 to the Regulation, and of drawings of the audible warning device (supplied by the
applicant for approval) with maximum format A4 (210 × 297 mm) or folded to this format
and on the scale 1:1.
5.5. On
every
audible
warning
device
which
conforms
to
a
type
approved
under
this
Regulation,
there
shall be affixed conspicuously, in an easily accessible place indicated on the approval form, an
international approval mark comprising:
5.5.1. a circle containing the letter ‘E’ followed by the distinguishing number of the country granting
approval ( 1 );
5.5.2. an
approval
number;
5.5.3. an additional symbol in the form of a figure in Roman numerals, showing the class to which the
AWD belongs.
5.6. The
approval
mark
and
the
additional
symbol
must
be
clearly
legible
and
indelible.
5.7.
Annex 3, Section I, to this Regulation gives an example of the arrangement of the approval mark.
( 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 Yugoslavia, 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,
35-36 (vacant), 37 for Turkey, 38-39 (vacant), 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 and 47 for South Africa. 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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6. SPECIFICATIONS
6.1. General
specifications
6.1.1. The
audible
warning
device
shall
emit
a
continuous
and
uniform
sound;
its
acoustic
spectrum
shall
not vary substantially during its operation.
For warning devices supplied with alternating current, this requirement shall apply only at constant
generator speed, within the range specified in paragraph 6.2.3.2.
6.1.2. The
warning
device
shall
have
acoustic
characteristics
(spectral
distribution
of
the
acoustic
energy,
sound pressure level) and mechanical characteristics such that it passes, in the order indicated, the
following tests.
6.2. Measurement
of
the
sound
characteristics
6.2.1. The
warning
device
should,
preferably,
be
tested
in
an
anechoic
environment.
Alternatively, it may be tested in a semi-anechoic chamber or in an open space ( 1 ). In this case,
precautions shall be taken to avoid reflections from the ground within the measuring area (for
instance by erecting a set of absorbing screens). Compliance with the spherical divergence to a limit
of 1 dB within a hemisphere of not less than 5 m radius, up to the maximum frequency to be
measured, especially in the measuring direction and at the height of the apparatus and the
microphone, shall be checked.
The ambient noise level shall be at least 10 dB lower than the sound pressure level to be measured.
The device to be tested and the microphone shall be placed at the same height. This height shall be
between 1,15 and 1,25 m. The axis of maximum sensitivity of the microphone shall coincide with
the direction of the maximum sound level of the device.
The microphone shall be so placed that its diaphragm is at a distance of 2 ± 0,01 m from the plane
of the sound outlet of the device. In the case of devices with several outlets, the distance shall be
determined in relation to the plane of the nearest outlet to the microphone.
6.2.2. The measurements of the sound pressure levels shall be made with a class 1 precision sound level
metre conforming to the specifications of IEC Publication No 651, first edition (1979). All
measurements shall be made using the time constant ‘F’. The measurement of the overall sound
pressure level shall be made using the weighting curve A. The spectrum of the sound emitted shall
be measured according to the Fourier transform of the acoustic signal.
Alternatively, one-third octave filters conforming to the specifications of IEC Publication No 225,
first edition (1966) may be used in this case, the sound pressure level in the mid-band frequency
2 500 Hz shall be determined by adding the quadratic means of the sound pressures in the one-
third mid-band frequencies 2 000, 2 500 and 3 150 Hz.
In every case, only the Fourier transform method shall be regarded as a reference method.
6.2.3. The
AWD
shall
be
supplied
with
current,
as
appropriate,
at
one
of
the
test
voltages:
6.2.3.1. in the case of AWDs supplied with direct current, at a voltage measured at the terminal of the
electric power source of 13/12 of the rated voltage.
( 1 ) The site may take the form, for instance, of an open space of 50 metres radius, the central part of which must be
practically horizontal over a radius of at least 20 metres, the surface being of concrete, asphalt or a similar material,
which must not be covered with powdery snow, tall weeds, or loose soil or cinders. The measurements shall be made
on a clear day. No-one other than the observer reading the instrument shall remain near the audible warning device or
the microphone, since the presence of spectators may affect the readings of the instrument to a considerable extent, if
they are near the audible warning device or the microphone. Any peak which appears to be unrelated to the general
sound level shall be disregarded in the reading.

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6.2.3.2. in the case of AWDs supplied with alternating current, the current shall be supplied by an electric
generator of the type normally used with this type of AWD. The acoustic characteristics of the
AWD shall be recorded for electric generator speeds corresponding to 50 %, 75 % and 100 % of
the maximum speed indicated by the manufacturer of the generator for continuous operation.
During this test, no other electrical load shall be imposed on the electric generator. The endurance
test described in paragraph 6.3 shall be carried out at a speed indicated by the manufacturer of the
equipment and selected from the above range.
6.2.4. If a rectified current source is used for the test of an AWD supplied with direct current, the
alternating component of the voltage measured at its terminals, when the warning devices are in
operation, shall not be more than 0,1 volt, peak to peak.
6.2.5. For
AWDs
supplied
with
direct
current,
the
resistance
of
the
connecting
leads,
expressed
in
ohms,
including terminals and contacts, shall be as close as possible to (0,10/12) × rated voltage in volts.
6.2.6. The warning device shall be mounted rigidly, by means of the equipment indicated by the manu
facturer, on a support whose mass is at least ten times that of the warning device under test and
not less than 30 kg. In addition, arrangements must be made to ensure that reflexions on the sides
of the support and its own vibrations have no appreciable effect on the measuring results.
6.2.7. Under the conditions set forth above, the sound pressure weighted in accordance with curve A
shall not exceed the following values:
(a) 115 dB(A) for AWDs intended principally for motor cycles with a power less than or equal to
7 kW;
(b) 118 dB(A) for AWDs intended principally for vehicles of categories M and N, and motor cycles
with a power greater than 7 kW.
6.2.7.1. In addition, the sound-pressure level in the frequency band 1 800 to 3 550 Hz shall be greater
than that of any component of a frequency above 3 550 Hz and in any event equal to or greater
than:
(a) 95 dB(A) for AWDs intended principally for motor cycles with a power less than or equal to
7 kW;
(b) 105 dB(A) for AWDs intended principally for vehicles of categories M and N, and motor cycles
with a power greater than 7 kW.
6.2.7.2. AWDs meeting the sound characteristics mentioned in (b) may be used on the vehicles mentioned
in (a).
6.2.8. The
specifications
indicated
above
shall
also
be
met
by
a
device
subjected
to
the
endurance
test
referred to in paragraph 6.3 below, with the supply voltage varying between 115 % and 95 % of its
rated voltage for AWDs supplied with direct current or, for AWDs supplied with alternating
current, between 50 % and 100 % of the maximum speed of the generator indicated by the
manufacturer for continuous operations.
6.2.9. The time lapse between the moment when the device is actuated and the moment when the sound
reaches the minimum value prescribed in paragraph 6.2.7 above shall not exceed 0,2 seconds
measured at an ambient temperature of 20 + 5 °C. This provision is applicable, inter alia, to
pneumatic or electro-pneumatic warning devices.
6.2.10. Pneumatic or electro-pneumatic warning devices shall, when operating under the power supply
conditions established for the devices by the manufacturers, satisfy the same acoustic requirements
as are prescribed for electrically operated audible warning devices.

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6.2.11. In the case of multiple-tone devices in which each sound-emitting unit is capable of functioning
independently, the minimum values specified above shall be obtained when each of the constituent
units is operated separately. The maximum value of the overall sound level shall not be exceeded
when all the constituent units are operated simultaneously.
6.3. Endurance
test
6.3.1. The AWD shall be supplied with current at the rated voltage and with the connecting lead
resistances specified in paragraphs 6.2.3 to 6.2.5 above, and operated respectively:
— 10 000 times for AWDs intended principally for motor cycles with power less than or equal to
7 kW,
— 50 000 times for AWDs intended principally for vehicles of categories M and N and motor
cycles with a power greater than 7 kW, each time for 1 second followed by an interval of 4
seconds. During the test, the AWD shall be ventilated by an air current having a speed of
approximately 10 m/sec.
6.3.2. If the test is made in an anechoic chamber, the chamber shall be large enough to ensure normal
dispersal of the heat released by the warning device during the test.
6.3.3. The
ambient
temperature
in
the
testing
room
shall
be
between
+
15°
and
+
30
°C.
6.3.4. If, after the AWD has been operated for half the number of times prescribed, the sound-level
characteristics are no longer the same as before the test, the AWD may be adjusted. After being
operated the prescribed number times, and after further adjustment if necessary, the AWD must
pass the test described in paragraph 6.2 above.
6.3.5. For warning devices of the electro-pneumatic type, the device may be lubricated with the oil
recommended by the manufacturer after every 10 000 times of operation.
7.
MODIFICATION OF THE TYPE OF AUDIBLE WARNING DEVICE AND EXTENSION APPROVAL
7.1.
Any modification of the type of audible warning device shall be notified to the administrative
department which granted approval to the type of audible warning device. This department may
then:
7.1.1. either
take
the
view
that
the
modifications
made
are
not
likely
to
have
any
appreciable
adverse
effect;
7.1.2. or call for a new report from the technical service responsible for the tests.
7.2.
Notice of confirmation of the approval, with particulars of the modifications, or of refusal of
approval shall be communicated to the Parties to the Agreement applying this Regulation, in
accordance with the procedure indicated in paragraph 5.4 above.
7.3. The
competent
authority
issuing
the
extension
of
approval
shall
assign
a
series
number
to
each
communication form drawn up for such an extension.
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.
AWD approved under this Regulation shall be so manufactured as to conform to the type
approved by meeting the requirements set forth in paragraph 6 above.
8.2. 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.

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9. PENALTIES
FOR
NON-CONFORMITY
OF
PRODUCTION
9.1. The
approval
granted
to
a
type
of
audible
warning
device
pursuant
to
this
Regulation
may
be
withdrawn if the conditions set forth in paragraph 8.1 are not complied with or if the audible
warning device fails to pass the checks referred to in paragraph 8.2 above.
9.2. Should
a
Party
to
the
Agreement
applying
this
Regulation
withdraw
an
approval
which
it
has
previously granted, it shall forthwith notify the other Contracting Parties applying this Regulation
by means of a copy of the approval form bearing at the end in large letters the statement, signed
and dated: ‘APPROVAL WITHDRAWN’.
10. PRODUCTION
DISCONTINUED
If the holder of an approval granted pursuant to this Regulation discontinues the production of the
type of audible warning device approved, he shall inform the authority which granted the approval.
Upon receipt of the communication, this authority shall inform the other Parties to the Agreement
applying this Regulation by means of a copy of the approval form bearing at the end in large
letters the statement, signed and dated: ‘PRODUCTION DISCONTINUED’.
II. AUDIBLE SIGNALS OF MOTOR VEHICLES
11. DEFINITIONS
For the purpose of this Regulation,
11.1. ‘Approval
of
the
motor
vehicle’
shall
be
understood
to
mean
approval
of
vehicle
type
with
regard
to its audible signal;
11.2. ‘Vehicle type’ shall be understood to mean vehicles not essentially different from another with
respect to such matters as:
11.2.1. the number and type(s) of warning devices fitted on the vehicle;
11.2.2. the mountings used to fit the warning devices to the vehicle;
11.2.3. the position of the warning devices on the vehicle;
11.2.4. the rigidity of the parts of the structure on which the warning device(s) is (are) mounted;
11.2.5. the shape and materials of the bodywork at the front of the vehicle which might affect the level of
the sound emitted by the warning device(s) and have a masking effect.
12. APPLICATION
FOR
APPROVAL
12.1. The
application
for
approval
of
a
vehicle
type
with
regard
to
its
audible
signals
shall
be
submitted
by the vehicle manufacturer or by his duly accredited representative;
12.2. It shall be accompanied by the following documents in triplicate giving the following particulars:
12.2.1. a description of the vehicle type with regard to the items mentioned in paragraph 11.2 above;
12.2.2. a list of the components required to identify the warning device(s) that may be mounted on the
vehicle;
12.2.3. Drawings indicating the position on the vehicle of the warning device(s) and of its (their)
mountings.
12.3. A vehicle representative of the vehicle type to be approved shall be submitted to the technical
service responsible for the approval tests.

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13. APPROVAL
13.1. If the vehicle type submitted for approval pursuant to this Regulation meets the requirements of
paragraphs 14 and 15 below, approval for this vehicle type shall be granted.
13.2. An
approval
number
shall
be
assigned
to
each
type
approved.
Its
first
two
digits
(at
present
00
for
the Regulation in its original form) shall indicate the series of amendments incorporating the most
recent major technical amendments made to the Regulation at the time of issue of the approval.
The same Contracting Party may not assign this number to another vehicle type.
13.3. Notice of approval or of refusal of approval or extension or withdrawal or production definitely
discontinued of a vehicle type pursuant to this Regulation shall be communicated to the Parties to
the Agreement applying this Regulation by means of a form conforming to the model in Annex 2
to the Regulation, and of drawings (supplied by the applicant for approval) with maximum format
A4 (210 × 297 mm), or folded to this format, and on an appropriate scale.
13.4. On every vehicle which conforms to a vehicle type approved under this Regulation there shall be
affixed conspicuously, in an easily accessible place indicated on the approval form, an international
approval mark comprising:
13.4.1. a circle containing the letter ‘E’ followed by the distinguishing number of the country granting
approval,
13.4.2. the number of this Regulation placed to the right of the circle referred to in paragraph 13.4.1.
13.5. If
the
vehicle
conforms
to
a
vehicle
type
approved,
under
another
(other)
Regulation(s)
annexed
to
the Agreement, in the same country as that which has granted the approval under this Regulation,
the symbol referred to in paragraph 13.4 need not be repeated; in this case, the additional numbers
and symbols of all the Regulations under which approval has been granted in the country which
granted the approval under this Regulation shall be set out in vertical columns to the right of the
symbol referred to in paragraph 13.4.
13.6. The
approval
mark
must
be
clearly
legible
and
indelible.
13.7.
The approval mark shall be placed near the plate bearing the characteristics of the vehicle and may
also be affixed to this plate.
13.8.
Annex 3, Section II, to this Regulation gives an example of the arrangement of the approval mark.
13.9. The
competent
authority
shall
verify
the
existence
of
satisfactory
arrangements
for
ensuring
effective control of the conformity of production before type approval is granted.
14. SPECIFICATIONS
The vehicle shall comply with the following specifications:
14.1. The
audible
warning
device(s)
(or
system)
fitted
on
the
vehicle
shall
be
of
a
type
approved
under
this Regulation;
Audible warning devices of Class II approved under this Regulation in its original form, and
therefore not bearing the symbol II in their approval mark, may continue to be fitted to vehicle
types submitted for approval pursuant to this Regulation.
14.2. The
test
voltage
shall
be
as
specified
in
paragraph
6.2.3
of
the
Regulation;
14.3. The sound pressure measurements shall be made in the conditions specified in paragraph 6.2.2 of
this Regulation;
14.4. The
A-weighted
sound
pressure
level
emitted
by
the
device
fitted
on
the
vehicle
shall
be
measured
at a distance of 7 m in front of the vehicle, the latter being placed on an open site, on ground as
smooth as possible and, in the case of devices supplied with direct current, with its engine stopped;

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14.5. The microphone of the measuring instrument shall be placed approximately in the mean longi
tudinal plane of the vehicle;
14.6. The
sound
pressure
level
of
the
background
noise
and
wind
noise
must
be
at
least
10
dB
(A)
below
the sound to be measured;
14.7. The maximum sound-pressure level shall be sought within the range of 0,5 and 1,5 m above the
ground;
14.8.
Measured under the conditions specified in paragraphs 14.2 to 14.7, the maximum sound-pressure
level (14.7) of the audible signal tested shall be at least:
(a) equal to 83 dB(A) and not more than 112 dB(A) for the signals of motor cycles of a power less
than or equal to 7 kW;
(b) equal to 93 dB(A) and at most 112 dB(A) for the signals of vehicles of categories M and N and
motor cycles of a power greater than 7 kW.
15. MODIFICATIONS
OF
VEHICLE
TYPE
AND
EXTENSION
OF
APPROVAL
15.1. Any modification of the vehicle type shall be notified to the administrative department which
granted approval to the vehicle type. This department may then:
15.1.1. either take the view that the modifications made are not likely to have any appreciable adverse
effect and that in any case the vehicle still meets the requirements; or
15.1.2. call for a new report from the technical service responsible for the tests.
15.2. Notice of confirmation of approval with particulars of the modifications, or of refusal of approval
shall be communicated to the Parties to the Agreement applying this Regulation, in accordance
with the procedure indicated in paragraph 13.3 above.
15.3. The
competent
authority
issuing
the
extension
of
approval
shall
assign
a
series
number
to
each
communication form drawn up for such an extension.
16. 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:
16.1. A
vehicle
approved
under
this
Regulation
shall
be
so
manufactured
as
to
conform
to
the
type
approved by meeting the requirements set forth in paragraph 14 above.
16.2. 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.
17. PENALTIES
FOR
NON-CONFORMITY
OF
PRODUCTION
17.1. The approval granted to a vehicle type pursuant to this Regulation may be withdrawn if the
conditions set forth in paragraph 16.1 above are not complied with, or if the vehicle fails to
pass the checks referred to in paragraph 16.2 above.
17.2. Should
a
Party
to
the
Agreement
applying
this
Regulation
withdraw
an
approval
which
it
has
previously granted, it shall forthwith notify the other Contracting Parties applying this Regulation
by means of a copy of the approval form bearing at the end in large letters the statement, signed
and dated: ‘APPROVAL WITHDRAWN’.

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L 323/42
EN
Official Journal of the European Union
6.12.2011
18. NAMES
AND
ADDRESSES
OF
THE
TECHNICAL
SERVICES
CONDUCTING
APPROVAL
TESTS
AND
OF
ADMINISTRATIVE DEPARTMENTS
The Parties to the Agreement applying this Regulation shall communicate to the United Nations
Secretariat the names and addresses of the technical services responsible for approval tests and of
the administrative departments which grant approval and to which forms certifying approval or
refusal or withdrawal of approval, issued in other countries, are to be sent.

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/43
ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 × 297 mm))

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L 323/44
EN
Official Journal of the European Union
6.12.2011
ANNEX 2
COMMUNICATION
(Maximum format: A4 (210 × 297 mm))

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EN
6.12.2011 Official
Journal
of
the
European
Union L
323/45
ANNEX 3
I. ARRANGEMENT OF THE APPROVAL MARK OF THE AUDIBLE WARNING DEVICE
(see paragraph 5.5 of this Regulation)
a = 8 mm min.
The above approval mark affixed to an audible warning device shows that this AWD of Class I has been approved in the
Netherlands (E 4) under approval number 002439. The first two digits of the approval number indicate that the approval
was granted in accordance with the requirements of Regulation No 28 in its original form.
Note: The approval number must be placed close to the circle and must be in a position either above or below the letter
‘E’ or to left or right of that letter. The digits of the approval number must be on the same side of the letter ‘E’ and
face in the same direction. The use of Roman numerals as approval numbers should be avoided so as to prevent
any confusion with other symbols.
II. ARRANGEMENT OF THE APPROVAL MARK OF A VEHICLE WITH REGARD TO ITS AUDIBLE SIGNALS
(see paragraph 13.4 of this Regulation)
MODEL A
a = 8 mm min.
The above approval mark affixed to a vehicle indicates that, pursuant to Regulation No 28, this vehicle type has been
approved in the Netherlands (E 4), with regard to its audible signals.
MODEL B
a = 8 mm min.
The above approval mark affixed to a vehicle indicates that, pursuant to Regulation Nos 24 and 28, this vehicle type has
been approved in the Netherlands (E 4), with regard to its audible signals and to emissions of pollutants by the Diesel
engine. In the case of the latter Regulation, the corrected value of the absorption factor is 1,30 m –1 .

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