Regulation No. 23-00

Name:Regulation No. 23-00
Description:Reversing and Manoeuvring Lamps.
Official Title:Uniform Provisions Concerning the Approval of: Reversing and Manoeuvring Lamps for Power-Driven Vehicles and their Trailers.
Country:ECE - United Nations
Date of Issue:1971-08-20
Amendment Level:00 Series, Supplement 20
Number of Pages:29
Vehicle Types:Agricultural Tractor, Bus, Car, Component, Heavy Truck, Light Truck, Trailer
Subject Categories:Lighting and Light Signalling Equipment
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Keywords:

approval, regulation, lamp, light, lamps, source, type, amendments, series, force, reversing, supplement, date, entry, annex, mark, number, approved, requirements, case, manoeuvring, production, conformity, granted, accordance, photometric, device, paragraph, original, intensity, manufacturer, vehicle, minimum, module, reference, marking, tests, version, part, application, axis, control, shown, test, sampling, identification, incorporated, emitted, combined, luminous

Text Extract:

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E/ECE/324
) Rev.1/Add.22/Rev.4/Amend.1
E/ECE/TRANS/505 )
November 9, 2015
STATUS OF UNITED NATIONS REGULATION
ECE 23-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
REVERSING AND MANOEUVRING LAMPS FOR POWER-DRIVEN
VEHICLES AND THEIR TRAILERS
Incorporating:
Corr. 1 to the 00 series of amendments
Dated: 01.07.92
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 05.05.91
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 24.09.92
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 11.02.96
Corr. 1 to Supplement 5 to the 00 series of amendments
Dated: 07.03.01
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 18.01.98
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 28.12.00
Supplement 8 to the 00 series of amendments
Date of Entry into Force: 26.08.02
Supplement 9 to the 00 series of amendments
Date of Entry into Force: 16.07.03
Supplement 10 to the 00 series of amendments
Date of Entry into Force: 26.02.04
Corr. 1 to Supplement 10 to the 00 series of amendments
Dated: 26.02.04
Supplement 11 to the 00 series of amendments
Date of Entry into Force: 09.11.05
Supplement 12 to the 00 series of amendments
Date of Entry into Force: 04.07.06
Supplement 13 to the 00 series of amendments
Date of Entry into Force: 02.02.07
Supplement 14 to the 00 series of amendments
Date of Entry into Force: 11.07.08
Supplement 15 to the 00 series of amendments (including Erratum)
Date of Entry into Force: 15.10.08
Supplement 16 to the 00 series of amendments
Date of Entry into Force: 09.12.10
Supplement 17 to the 00 series of amendments
Date of Entry into Force: 23.06.11
Supplement 18 to the 00 series of amendments
Date of Entry into Force: 18.11.12
Supplement 19 to the 00 series of amendments
Date of Entry into Force: 15.07.13
Supplement 20 to the 00 series of amendments
Date of Entry into Force: 08.10.15

REGULATION No. 23
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF REVERSING AND
MANOEUVRING LAMPS FOR POWER-DRIVEN VEHICLES AND THEIR TRAILERS
REGULATION
Scope
1. Definitions
2. Application for approval
3. Markings
4. Approval
5. General specifications
6. Intensity of light emitted
7. Test procedures
8. Colour of light emitted
9. Conformity of production
CONTENTS
10. Penalties for non-conformity of production
11. Production definitively discontinued
12. Names and addresses of Technical Services responsible for conducting approval tests, and
of Type Approval Authorities
ANNEXES
Annex 1
Annex 2
Annex 3
Annex 4
Annex 5
Communication
Examples of arrangements of approval marks
Photometric measurements
Minimum requirements for conformity of production control procedures
Minimum requirements for sampling by an inspector

2. APPLICATION FOR APPROVAL
2.1. The application for approval shall be submitted by the holder of the trade name or mark, or
by his duly accredited representative.
At the choice of the applicant, it will specify that the device may be installed on the vehicle
with different inclinations of the reference axis in respect to the vehicle reference planes and
to the ground or rotate around its reference axis; these different conditions of installation
shall be indicated in the communication form.
2.2. For each type of reversing lamp or manoeuvring lamp, the application shall be accompanied
by:
2.2.1. Drawings, in triplicate, in sufficient detail to permit identification of the type of the reversing
lamp or a manoeuvring lamp and showing in what geometrical position(s) the reversing
lamp may be mounted on the vehicle; the axis of observation to be taken as the axis of
reference in the tests (horizontal angle H = 0, vertical angle V = 0); and the point to be taken
as the centre of reference in the said tests. The drawings must show the position intended
for the approval number and the additional symbol in relation to the circle of the approval
mark.
In addition the mounting height and the orientation of the reference axis of the manoeuvring
lamp(s) shall be indicated in the drawing in relation to the ground, the vertical and the
longitudinal axis.
2.2.2. A brief technical description stating, in particular, with the exception of lamps with
non-replaceable light sources:
(a)
(b)
(c)
the category or categories of filament lamp(s) prescribed; this filament lamp category
shall be one of those contained in Regulation No. 37; and its series of amendments in
force at the time of application for type approval; and/or
The category or categories of LED light source(s) prescribed; this LED light source
category shall be one of those contained in Regulation No. 128 and its series of
amendments in force at the time of application for type approval; and/or
The light source module specific identification code.
2.2.3. Two samples. If the devices are not identical but are symmetrical and suitable for mounting
one on the left and one on the right side of the vehicle, the two samples submitted may be
identical and be suitable for mounting only on the right or only on the left side of the vehicle.

4. APPROVAL
4.1. If the two samples of a type of reversing lamp or a manoeuvring lamp meet the
requirements of this Regulation, approval shall be granted.
4.2. An approval number shall be assigned to each type approved. The same Contracting Party
shall not assign the same number to another type of reversing lamp or manoeuvring lamp
covered by this Regulation. Notice of approval or of extension or refusal or withdrawal of
approval or production definitely discontinued of a type of reversing lamp pursuant to this
Regulation shall be communicated to the Parties to the 1958 Agreement which apply this
Regulation by means of a form conforming to the model in Annex 1 to this Regulation.
4.3. Every reversing lamp or manoeuvring lamp conforming to a type approved under this
Regulation shall bear in the space referred to in Paragraph 3.4. above, in addition the mark
and the particulars prescribed above in Paragraphs 3.1., 3.2. and 3.3. or 3.5. respectively:
4.3.1. An international approval mark consisting of:
4.3.1.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted the approval; and
4.3.1.2. An approval number.
4.3.2. An additional symbol consisting of Letters A and R, mingled as shown in Annex 2 to this
Regulation.
On devices meeting the requirements of this Regulation in respect of the manoeuvring
lamps an additional symbol consisting of Letters M and L, arranged as shown in Annex 2 to
this Regulation.
4.3.3. The first two digits of the approval number which indicate the most recent series of
amendments to this Regulation may be placed in the vicinity of the additional Symbol "AR"
or "ML".
4.3.4. On reversing lamps of which the visibility angles are asymmetrical with regard to the
reference axis in a horizontal direction, an arrow pointing towards the side on which the
photometric specifications are met up to an angle of 45° H.

4.5.3. 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.
4.5.4. 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.
4.6. The mark and symbol referred to in Paragraphs 4.3.1. and 4.3.2. shall be indelible and shall
be clearly legible even when the reversing lamp is mounted on the vehicle.
In the case of a manoeuvring lamp:
(a)
(b)
A space large enough to accommodate the approval mark on the lens or on its
protective housing, which shall be legible when the device has been mounted on the
vehicle, shall be provided. Other components of the device shall bear the name of the
manufacturer and a means of identification. In case of limited space for the approval
mark(s) it shall be placed on a part of the vehicle which is permanently connected to
the manoeuvring lamp or on the vehicle data plate;
The space for the approval mark shall be shown on the drawings referred to
Paragraph 2.2. above or indicated in the application for approval.
4.7. Annex 2 gives examples 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. The Letters A and R may be mingled.
5. GENERAL SPECIFICATIONS
5.1. Each sample shall conform to the specifications set forth in the paragraphs below.
5.2. Reversing lamps shall be so designed and constructed that in normal use, despite the
vibration to which they may then be subjected, they continue to function satisfactorily and
retain the characteristics prescribed by this Regulation.
5.3. In the case of light source modules, it shall be checked that:
5.3.1. The design of the light source module(s) shall be such as:
(a)
(b)
that each light source module can only be fitted in no other position that the
designated and correct one and can only be removed with the use of tool(s);
If there are more than one light source module used in the housing for a device, light
source modules having different characteristics cannot be interchanged within the
same lamp housing.
5.3.2. The light source module(s) shall be tamperproof.
5.3.3. A light source module shall be so designed that regardless of the use of tool(s), it shall not
be mechanically interchangeable with any replaceable approved light source.

6.1.4. In every other direction of measurement shown in Annex 3 to this Regulation the luminous
intensity shall be not less than the minima specified in that Annex.
However, in the case where the reversing lamp is intended to be installed on a vehicle
exclusively in a pair of devices, the photometric intensity may be verified only up to an angle
of 30° inwards where a photometric value of at least 25cd shall be satisfied.
This condition shall be clearly explained in the application for approval and relating
documents (see Paragraph 2. of this Regulation).
Moreover, in the case where the type approval will be granted applying the condition above,
a statement in Paragraph 11. "Comments" of the communication form (see Annex 1 to this
Regulation), will inform that the device shall only be installed in a pair.
6.1.5. In the case of a single lamp containing more than one light source, the lamp shall comply
with the minimum intensity required when any one light source has failed and when all light
sources are illuminated the maximum intensities shall not be exceeded. A group of light
sources, wired so that the failure of any one of them causes all of them to stop emitting light,
shall be considered to be one light source.
6.2. Intensity of the Light Specifications for Manoeuvring Lamps
6.2.1. The intensity shall not exceed 500cd in all directions in which the light can be observed,
when installed in any mounting position specified by the applicant.
6.2.2. The device must be so designed that the light emitted directly towards the side, the front or
the rear of the vehicle does not exceed 0.5cd within the angular field as defined below.
(a) The vertical minimum angle φ (in degree) is:
φ = arctan (1-mounting height)/10; where h is mounting height in m
(b) The vertical maximum angle φ (in degree) is:
φ = φ + 11,3.
The measurement shall be limited to a horizontal angle ranging from +90° to -90° with
respect to the line which cuts the reference axis and which is perpendicular to the vertical
longitudinal plane of the vehicle.
The measurement distance shall be in minimum 3m.

8. COLOUR OF LIGHT EMITTED
In the case of reversing lamps the colour of the light emitted inside the field of the light
distribution grid defined at Paragraph 2. of Annex 3 shall be white.
In the case of manoeuvring lamps the colour of the light emitted inside the field of the whole
light distribution shall be white.
To check these colorimetric characteristics, the test procedure described in Paragraph 7. of
this Regulation shall be applied. Outside this field no sharp variation of colour shall be
observed.
However, for lamps equipped with non-replaceable light sources (filament lamps and other),
the colorimetric characteristics should be verified with the light sources present in the lamp,
in accordance with relevant subparagraphs of Paragraph 7.1. of this Regulation.
9. 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:
9.1. Lamps 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 8. above.
9.2. The minimum requirements for conformity of production control procedures set forth in
Annex 4 to this Regulation shall be complied with.
9.3. The minimum requirements for sampling by an inspector set forth in Annex 5 to this
Regulation shall be complied with.
9.4. The Type Approval 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 two years.
10. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
10.1. The approval granted in respect of a type of reversing lamp or manoeuvring lamps pursuant
to this Regulation may be withdrawn if the foregoing requirements are not complied with or if
the reversing lamp or manoeuvring lamps bearing the mark referred to in Paragraphs 4.3.1.
and 4.3.2. does not conform to the type approved.
10.2. If a Contracting Party to the Agreement which applies this Regulation withdraws an approval
it has previously granted, it shall forthwith so notify the other Contracting Parties applying
this Regulation by means of a communication form conforming to the model in Annex 1 to
this Regulation.
11. PRODUCTION DEFINITIVELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of reversing lamp or
manoeuvring lamps approved in accordance with this Regulation, he shall so inform the
Type Approval Authority which granted the approval. Upon receiving the relevant
communication that Type Approval Authority shall inform thereof the other Parties to the
1958 Agreement which apply this Regulation by means of a communication form
conforming to the model in Annex 1 to this Regulation.

ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 × 297mm)
issued by: Name of administration
.......................................
.......................................
.......................................
concerning:
– APPROVAL GRANTED
– APPROVAL EXTENDED
– APPROVAL REFUSED
– APPROVAL WITHDRAWN
– PRODUCTION DEFINITIVELY DISCONTINUED
of a type of reversing lamp pursuant to Regulation No. 23
Approval No .................................................. Extension No . ...............................
of a type of manoeuvring lamp pursuant to Regulation No. 23
Approval No .................................................. Extension No . ...............................
1 Trade name or mark of the device: .....................................................................................................
2. Manufacturer's name for the type of device: .......................................................................................
3. Manufacturer's name and address: .....................................................................................................
..............................................................................................................................................................
4. If applicable, name and address of the manufacturer's representative: .............................................
..............................................................................................................................................................
5. Submitted for approval on: ..................................................................................................................
6. Technical service responsible for conducting approval tests: .............................................................
..............................................................................................................................................................
7. Date of report issued by that service: ..................................................................................................
8. Number of test report issued by that service: ......................................................................................

ANNEX 2
EXAMPLES OF ARRANGEMENTS OF APPROVAL MARKS
Model A
Optional
a = 5mm min.
Figure 1
Marking for Single Lamps
The device bearing the approval mark shown above is a reversing lamp approved in the Netherlands
(E4) pursuant to Regulation No. 23 under approval Number 221. The approval number indicates that the
approval was granted in accordance with the requirements of Regulation No. 23 in its original form or as
amended by Supplements 1 and/or 2, as the case may be. The arrow indicates the side on which the
required photometric specifications are met up to an angle of 45° H.
Note: The approval number and additional symbol shall be placed close to the circle and either above or
below the Letter "E" or to the left or right of that letter. The digits of the approval number and of the
production serial number shall be on the same side of the Letter "E" and face the same direction. The
use of Roman numerals as approval numbers should be avoided so as to prevent any confusion with
other symbols.

Note: The three examples of approval marks, Models B, C, and D represent three possible variables for
the marking of a lighting device when two or more lamps are part of the same assembly of grouped,
combined or reciprocally incorporated lamps. This approval mark shows that the device was approved in
the Netherlands (E4) under approval Number 3333 and comprising:
A reflex-retro reflector of Class IA approved in accordance with the 02 series of amendments to
Regulation No. 3;
A rear direction indicator lamp of Category 2a approved in accordance with the 01 series of
amendments Regulation No. 6;
A red rear position lamp (R) approved in accordance with the 02 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 02 series of
amendments to Regulation No. 7.
Model E
Marking of Independent Lamps
The above example corresponds to the marking of a lens intended to be used in different types of lamps.
The approval marks indicate that the device was approved in Spain (E9) under approval number 1432
and comprises:
A rear fog lamp (F) approved in accordance with the Regulation No. 38 in its original version,
A rear direction indicator lamp of Category 2a approved in accordance with the 01 series of
amendments to Regulation No. 6,
A reversing lamp (AR) approved in accordance with Regulation No. 23 in its original version,
A red rear position (side) lamp (R) approved in accordance with the 02 series of amendments to
Regulation No. 7,
A stop-lamp with one level of illumination (S1) approved in accordance with the 02 series of
amendments to Regulation No. 7.

ANNEX 3
PHOTOMETRIC MEASUREMENTS
1. MEASUREMENT METHODS GENERAL
1.1. When photometric measurements are taken, stray reflections shall be avoided by
appropriate masking.
1.2. In the event that the results of measurements are challenged, measurements shall be taken
in such a way as to meet the following requirements:
1.2.1. The distance of measurement shall be such that the law of the inverse of the square of the
distance is applicable.
1.2.2. The measuring equipment shall be such that the angle subtended by the receiver from the
reference centre of the light is between 10' and 1°.
1.2.3. The intensity requirement for a particular direction of observation shall be satisfied if the
required intensity is obtained in a direction deviating by not more than one-quarter of a
degree from the direction of observation.
1.3. In the case where the device may be installed on the vehicle in more than one or in a field of
different positions the photometric measurements shall be repeated for each position or for
the extreme positions in the field of the reference axis specified by the manufacturer.
2. FOR REVERSING LAMPS THE MEASURING POINTS EXPRESSED IN DEGREES OF
ANGLE WITH THE AXIS OF REFERENCE AND VALUES OF THE MINIMUM
INTENSITIES OF THE LIGHT EMITTED

ANNEX 4
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 lamps shall not
be contested if, when testing photometric performances of any lamp chosen at random
according to Paragraph 7. of this Regulation, respectively:
1.2.1. No measured value deviates unfavourably by more than 20% from the values prescribed in
this Regulation.
1.2.2. If, in the case of a lamp equipped with a replaceable light source and if results of the test
described above do not meet the requirements, tests on lamps shall be repeated using
another standard light source.
1.3. The chromaticity coordinates shall be complied when tested under conditions of
Paragraph 7. of this Regulation.
2. MINIMUM REQUIREMENTS FOR VERIFICATION OF CONFORMITY BY THE
MANUFACTURER
For each type of lamp 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.

ANNEX 5
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 performances, the conformity of mass-produced lamps shall not
be contested if, when testing photometric performances of any lamp chosen at random
according to Paragraph 7. of this Regulation, respectively:
1.2.1. No measured value deviates unfavourably by more than 20% from the values prescribed in
this Regulation.
1.2.2. If, in the case of a lamp equipped with a replaceable light source and if results of the test
described above do not meet the requirements, tests on lamps shall be repeated using
another standard light source.
1.2.3. Lamps with apparent defects are disregarded.
1.3. The chromaticity coordinates shall be complied when tested under conditions of
Paragraph 7. of this Regulation.
2. FIRST SAMPLING
In the first sampling four lamps 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 Figure 1 of this Annex the conformity of
mass-produced lamps shall not be contested if the deviation of the measured values of the
lamps in the unfavourable directions are:
2.1.1.1. Sample A
A1:
one lamp
0%
one lamp not more than
20%
A2:
both lamps more than
0%
but not more than
20%
go to Sample B

2.3.2. Sample B
B4:
in the case of A2
one lamp more than
0%
but not more than
20%
one lamp more than
20%
B5: in the case of A2
both lamps more than 20%
B6:
in the case of A2
one lamp
0%
one lamp more than
30%
2.3.3. or, if the conditions of Paragraph 1.2.2. for Samples A and B are not fulfilled.
3. REPEATED SAMPLING
In the cases of A3, B2, B3 a repeated sampling, third Sample C of two lamps and fourth
Sample D of two lamps, selected from stock manufactured after alignment, is necessary
within two months' time after the notification.
3.1. The Conformity is not Contested
3.1.1. Following the sampling procedure shown in Figure 1 of this Annex the conformity of
mass-produced lamps shall not be contested if the deviations of the measured values of the
lamps are:
3.1.1.1. Sample C
3.1.1.2. Sample D
C1:
one lamp
0%
one lamp not more than
20%
C2:
both lamps more than
0%
but not more than
20%
go to Sample D
D1: in the case of C2
both lamps 0%
3.1.2. or, if the conditions of Paragraph 1.2.2. for Sample C are fulfilled.

Figure 1
Reversing and Manoeuvring Lamps.