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
Date: 2009-01-31
Institutions: United Nations Economic Commission for Europe
Subjects: approval, commercial vehicle, harmonisation of standards, lighting equipment, motor vehicle, safety device, safety standard, technical standard

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(Acts adopted under the EC Treaty/Euratom Treaty whose publication is not obligatory)

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:

Revision 3

Supplement 10 to the 02 series of amendments — Date of entry into force: 2 February 2007

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 administra-

tive 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 — Arrangements 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

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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

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.

2.2.

2.3.

2.4.

2.5.

2.6.

2.7.

2.8.

2.9.

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.

‘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.

‘Retro-reflecting optical unit’ means
retro-reflection.

a

combination of optical

components producing

‘Retro-reflecting device’ (1) means an assembly ready for use and comprising one or more
retro-reflecting optical units.

‘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.

‘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.

‘Angle of rotation’ means the angle through which the retro-reflecting device is rotated about its
axis of reference starting from one given position.

‘Angular diameter of the retro-reflecting device’ means the angle subtended by the greatest dimen-
sion of the visible area of the illuminating surface, either at the centre of the source of illumination
or at the centre of the receiver.

‘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.

(1) Also called ‘retro-reflectors’.
(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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2.11.

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.

2.14.

Retro-reflecting devices of Class IB and IIIB are devices combined with other signal lamps which
are not watertight according to Annex 7, paragraph 1.1, and which are integrated into the body of
a vehicle.

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 accom-
panied 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.

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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.

5.3.

5.4.

5.5.

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 para-
graph 3.1.4 of this Regulation shall be required to meet only the colorimetric specifications
(Annex 6), the other tests no longer being required. Paragraph 5.2 is not applicable to devices of
Class IVA.

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 indi-
cate 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 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.

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.

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 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 incorpo-
rated 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 incorporated
lamps.

(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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5.6.1. 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.

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 addi-
tional 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.

6.5.

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.

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.

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7.

SPECIAL SPECIFICATIONS (TESTS)

7.1.

7.2.

Retro-reflecting devices must also satisfy the conditions as to dimensions and shape, and the colori-
metric, 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).

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:

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.

The minimum requirements for conformity of production control procedures set forth in Annex 17
to this Regulation shall be complied with.

The minimum requirements for sampling by an inspector set forth in Annex 18 to this Regulation
shall be complied with.

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 two years.

8.1.

8.2.

8.3.

8.4.

9.

PENALTIES FOR NON-CONFORMITY OF PRODUCTION

9.1.

9.2.

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.

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
the technical services responsible for
United Nations secretariat
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.

the names and addresses of

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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 (cm2)

C

= Centre of reference

NC = Axis of reference

Rr

= Receiver, observer or measuring device

Cr

= Centre of receiver

Ør = Diameter of receiver Rr if circular (cm)

Se

= Source of illumination

Cs

= Centre of source of illumination

Øs = 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

a

β

γ

δ

ε

= Angle of divergence

= 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.

= Angular diameter of the measuring device Rr as seen from point C

= Angular diameter of the source Se as seen from point C

= Angle of rotation. This angle is positive when the rotation is clockwise as seen when looking towards the illumi-
nating 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

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ANNEX 3

EXAMPLES OF APPROVAL MARKS

Figure 1

Marking for single lamps

MODEL A

MODEL B

a = 4 mm min.

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MODEL C

a = 4 mm min.

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 indi-
cating 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

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MODEL E

MODEL F

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 incorpo-
rated 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 one hour after this test examined as to their colorimetric characteristics (Annex 6) 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, para-
graph 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, para-
graph 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, para-
graphs 4 and 4.1.

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ANNEX 5

SPECIFICATIONS OF SHAPE AND DIMENSIONS

1.

1.1.

1.2.

2.

2.1.

2.2.

2.3.

2.4.

SHAPE AND DIMENSIONS OF RETRO-REFLECTING DEVICES IN CLASS IA OR IB

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.

The preceding paragraph notwithstanding, a shape resembling the letters or digits of simple form O, I, U or 8 is
permissible.

SHAPE AND DIMENSIONS OF RETRO-REFLECTING DEVICES IN CLASSES IIIA AND IIIB (see appendix to this
Annex)

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.

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.

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.

The illuminating surface of a retro-reflecting device shall be considered to be continuous if the edges of the illumi-
nating 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.

3.

3.1.

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 % of the effective length between the extremities of the illumi-
nating surface.

SHAPE AND DIMENSIONS OF RETRO-REFLECTING DEVICES IN CLASS IVA

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 cm2.

4.

Compliance with the above specifications shall be verified by visual inspection.

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Appendix

RETRO-REFLECTORS FOR TRAILERS — CLASSES IIIA AND IIIB

Note: These sketches are for illustration purposes only.

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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 ICI standard illuminant A, with an angle of divergence of 1/3° and
an illumination angle of V = H = 0°, or, if this produces a colourless surface reflection, an angle V = ± 5°, H = 0°,
the trichromatic coordinates of the reflected luminous flux must be within the following limits: ≤

Red:

limit towards yellow:

y ≤ 0,335

limit towards purple:

Amber:

limit towards green:

limit towards red:

y ≥ 0,980 - x

y ≤ x - 0,120

y ≥ 0,390

y ≥ 0,790 - 6,670 x
2.1. In the case of red and amber, compliance with the colorimetric specifications shall be verified by a visual comparison

limit towards white:

test.

2.2. If any doubt remains after this test, compliance with the colorimetric specifications shall be verified by determining

the trichromatic coordinates of the most doubtful sample.

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.

3.1. This shall be verified by the visual comparison test indicated above, the control field being illuminated by a light

source of which the trichromatic coordinates differ by 0,01 from that of standard illuminant A.

3.2. In case of doubt, the trichromatic coordinates for the most selective sample shall be determined.

31.1.2009

EN

Official Journal of the European Union

L 31/19

ANNEX 7

PHOTOMETRIC SPECIFICATIONS

1.

2.

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.

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 cm2 though the surfaces of the retro-reflecting optical units need not necessarily attain this area. The manu-
facturer 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 milli-

candelas per lux, for the angles of divergence and illumination shown.

Class

IA, IB

IIIA, IIIB

Angle of
divergence
α

20′

1°30′

20′

1°30′

Vertical V
Horizontal H

Illumination angles (in degrees)

0°
0°

300

5

450

12

± 10°
0°

200

2,8

200

8

±5
± 20°

100

2,5

150

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 para-

graph 3.1.1 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 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.

Colour

White

Amber

Red

Angle of
divergence
α

20′

1°30′

20′

1°30′

20′

1°30′

Illumination angles (in degrees)

Vertical V
Horizontal H

0
0

± 10
0

0
± 20

1,800

1,200

610

34

24

15

0
± 30

540

15

0
± 40

470

15

0
± 50

400

15

1,125

750

380

335

290

250

21

15

10

10

10

10

450

300

150

135

115

100

9

6

4

4

4

4

L 31/20

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Official Journal of the European Union

31.1.2009

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 diver-
gence 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. When the CIL is
measured for the other angles of illumination and divergence, the retro-reflecting device shall be placed in the posi-
tion 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 diver-
gence 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 % or more, all measure-
ments for all angles of illumination and divergence shall be made for ε = 0°.

31.1.2009

EN

Official Journal of the European Union

L 31/21

ANNEX 8

RESISTANCE TO EXTERNAL AGENTS

1.

1.1.

1.1.1.

1.1.2.

1.1.3.

RESISTANCE TO WATER AND DIRT PENETRATION

Water submersion test

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
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 condi-
tions in water at a temperature of 25 ± 5 °C.

the water. This test shall be repeated after

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.

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 6, 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.

1.2.1.

Moisture test

The test evaluates the ability of the sample device to resist moisture penetration from a water spray and deter-
mines 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.

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.

L 31/22

EN

Official Journal of the European Union

31.1.2009

1.2.1.2.3. If the retro-reflector is reciprocally incorporated or grouped with signalling or lighting functions, these func-
tions shall be operated at design voltage according to a cycle of 5 min ON (in flashing mode, where appro-
priate), 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 m3 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 (*).

1.2.2.2. 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.

(*) American society for Testing and Materials.

31.1.2009

EN

Official Journal of the European Union

L 31/23

2.

2.1.

2.2.

2.3.

2.4.

RESISTANCE TO CORROSION

Retro-reflecting devices must be so designed that they retain the prescribed photometric and colorimetric char-
acteristics 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, particu-
larly when an essential metal component seems liable to be attacked.

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 two hours during which the sample is allowed to dry.

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 % of impurities.

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 % of n-heptane and 30 vol % of toluol. After about
five 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 five minutes, the surface shall be cleaned.
The CIL shall then be measured (Annex 4, paragraph 3.2 or Annex 14, paragraph 4.2).

5.

5.1.

5.2.

5.3.

RESISTANCE OF THE ACCESSIBLE REAR FACE OF MIRROR-BACKED RETRO-REFLECTING DEVICES

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 one minute. The cotton cloth is
then removed and the retro-reflecting device left to dry.

As soon as evaporation is completed, an abrasion test shall be made by brushing the rear face with the same
nylon brush as before.

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.

L 31/24

EN

Official Journal of the European Union

31.1.2009

STABILITY IN TIME OF THE OPTICAL PROPERTIES (1) OF RETRO-REFLECTING DEVICES

ANNEX 9

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.

31.1.2009

EN

Official Journal of the European Union

L 31/25

ANNEX 12

CHRONOLOGICAL ORDER OF TESTS

Number of
Annex

Number of
paragraph (*)

TESTS

-

5

10

6

7

7

8

4

4

8

8

4

4

8

8

4

6

-

-

-

-

3

1

General specifications: visual inspection

Shapes and dimensions: visual inspection

Heat:

48 h at 65 ± 2 °C

Visual inspection for distortion

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

Photometry: limited to 20′ and V = H = 0°

Complete photometry

Water:

10 min. in normal position

10 min. in inverted position

visual inspection

3.1

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

3.2

Photometry: limited to 20′ and V = H = 0°

3

4

Motor fuels:

5 min.

visual inspection

Oils:

5 min.

visual inspection

3.1

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

3.2

Photometry: limited to 20′ and V = H = 0°

2

Corrosion:

24 hours

2 hours interval

24 hours

visual inspection

5

Rear face:

1 min.

visual inspection

3.1

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

a

x

x

x

x

x

x

b

x

x

x

x

x

x

x

c

x

x

x

x

x

x

x

d

x

x

x

x

x

x

x

i

x

x

x

x

x

x

j

x

x

x

x

x

x

g

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

h

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

SAMPLES

e

x

x

x

x

x

x

x

x

x

x

x

x

x

x

f

x

x

x

x

x

x

x

x

x

x

x

x

x

x

L 31/26

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Official Journal of the European Union

31.1.2009

a

b

c

d

SAMPLES

e

x

f

x

g

h

i

j

Number of
Annex

Number of
paragraph (*)

TESTS

Photometry: limited to 20′ and V = H = 0°

Stability in time

Colorimetry: Visual inspection or

trichromatic coordinates

Photometry: limited to 20′ and V = H = 0°

Colour-fastness

Colorimetry: Visual inspection or

trichromatic coordinates

Photometry: limited to 20′ and V = H = 0°

4

9

4

4

11

4

4

4

3.2

-

3.1

3.2

-

3.1

3.2

2

(*) of the Regulation.

Deposit of samples with administration

x

x

31.1.2009

EN

Official Journal of the European Union

L 31/27

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 one hour minimum after this
test examined as to their colorimetric characteristics (Annex 6) 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 abra-
sive-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 diver-

gence 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.

L 31/28

EN

Official Journal of the European Union

31.1.2009

ANNEX 15

CHRONOLOGICAL ORDER OF TESTS FOR CLASS IVA

Number of
Annex

Number of
paragraph (*)

TESTS

6

General specifications: visual inspection

a

x

x

x

x

x

x

x

b

x

x

x

x

x

x

x

x

c

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

d

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

g

x

x

x

x

x

x

h

x

x

x

x

x

x

i

x

x

x

x

x

x

j

x

x

x

x

x

x

SAMPLES

e

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

f

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

Shape and dimensions: visual inspection

Heat:

48 h at 65 ± 20 °C

Visual inspection for distortion

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

Photometry: limited to 20′ and V = H = 0°

Complete photometry

Water:

10 min. in normal position

10 min. in inverted position

visual inspection

Motor fuels: 5 min.

visual inspection

Oils:

5 min.

visual inspection

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

Photometry: limited to 20′ and V = H = 0°

Corrosion:

24 hours

2 hours' interval

24 hours

visual inspection

Rear face:

1 min.

visual inspection

Impact

visual inspection

Colorimetry: visual inspection

Trichromatic coordinates in case of doubt

Photometry: limited to 20′ and V = H = 0°

Deposit of samples with administration

x

x

-

5

10

6

7

8

8

8

8

6

7

8

8

13

6

7

4

(*) of the Regulation.

-

-

-

-

-

1

3

4

-

-

2

5

-

-

-

2

31.1.2009

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Official Journal of the European Union

L 31/29

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, para-
graph 1, which for Classes IB and IIIB devices may be replaced by the test specified in Annex 8, paragraph 1.2.

L 31/30

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Official Journal of the European Union

31.1.2009

MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES

ANNEX 17

1.

1.1.

GENERAL

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 % 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 resis-
tance 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 %, the minimum prob-
ability of passing a spot check in accordance with Annex 18 (first sampling) would be 0,95.

31.1.2009

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Official Journal of the European Union

L 31/31

ANNEX 18

MINIMUM REQUIREMENTS FOR SAMPLING BY AN INSPECTOR

GENERAL

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 manufac-
turing deviations.

With respect
contested if, when testing photometric performances of any retro-reflector chosen at random:

to photometric performance,

the conformity of mass-produced retro-reflectors shall not be

1.

1.1.

1.2.

1.2.1.

no measured value deviates unfavourably by more than 20 % 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 Figure 1 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

one retro-reflector not more than

A2:

both retro-reflectors more than

but not more than

go to sample B

2.1.1.2. sample B

B1:

both retro-reflectors

2.2.

The conformity is contested

0 %

20 %

0 %

20 %

0 %

2.2.1.

Following the sampling procedure shown in Figure 1 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

one retro-reflector more than

but not more than

2.2.1.2. sample B

B2:

in the case of A2

one retro-reflector more than

but not more than

one retro-reflector not more than

B3:

in the case of A2

one retro-reflector

one retro-reflector more than

but not more than

20 %

20 %

30 %

0 %

20 %

20 %

0 %

20 %

30 %

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Official Journal of the European Union

31.1.2009

2.3.

Approval withdrawn

Conformity shall be contested and paragraph 9 applied if, following the sampling procedure in Figure 1 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

one retro-reflector more than

A5:

both retro-reflectors more than

2.3.2.

sample B

B4:

in the case of A2

one retro-reflector more than

but not more than

one retro-reflector more than

B5:

in the case of A2

both retro-reflectors more than

B6:

in the case of A2

one retro-reflector

one retro-reflector more than

3.

REPEATED SAMPLING

20 %

30 %

20 %

0 %

20 %

20 %

20 %

0 %

30 %

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 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
retro-reflectors shall not be contested if the deviations of the measured values of the retro-reflectors are:

this Annex the conformity of mass-produced

3.1.1.1. sample C

C1:

one retro-reflector

one retro-reflector not more than

C2:

both retro-reflectors more than

but not more than

go to sample D

3.1.1.2. sample D

D1:

in the case of C2

both retro-reflectors

3.2.

The conformity is contested

0 %

20 %

0 %

20 %

0 %

3.2.1.

Following the sampling procedure shown in Figure 1 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

but not more than

one retro-reflector not more than

0 %

20 %

20 %

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EN

Official Journal of the European Union

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3.3.

Approval withdrawn

Conformity shall be contested and paragraph 9 applied if, following the sampling procedure in Figure 1 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

one retro-reflector more than

C4:

both retro-reflectors more than

3.3.2.

sample D

D3:

in the case of C2

one retro-reflector 0 or more than

one retro-reflector more than

4.

RESISTANCE TO PENETRATION OF WATER

20 %

20 %

20 %

0 %

20 %

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 Figure 1 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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Official Journal of the European Union

31.1.2009

Figure 1