EN Official Journal of the European Union L 148/55

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 38 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of rear fog lamps for power-driven vehicles and their trailers

Incorporating all valid text up to:

Supplement 14 to the original version of the Regulation — Date of entry into force: 15 October 2008

Corrigendum 1 to Supplement 12 — Date of entry into force: 10 March 2009

CONTENTS

REGULATION

0. Scope

1. Definitions

2. Application for approval

3. Markings

4. Approval

5. General specifications

6. Intensity of light emitted

7. Test procedure

8. Heat resistance test

9. Colour of light emitted

10. Conformity of production

11. Penalties for non-conformity of production

12. Production definitely discontinued

13. Names and addresses of technical services responsible for conducting approval tests, and of administrative departments

ANNEXES

Annex 1 — Communication concerning the approval or extension or refusal or withdrawal of approval or production definitely discontinued of a type of rear fog lamps for power-driven vehicles and their trailers pursuant to Regulation No 38

Annex 2 — Arrangements of approval marks

Annex 3 — Photometric measurements

Annex 4 — Minimum requirements for conformity of production control procedures

Annex 5 — Minimum requirements for sampling by an inspector

0. SCOPE

This Regulation applies to rear fog lamps for vehicles of categories L3, L4, L5, L7, M, N, O, and T (1).

1. DEFINITIONS

For the purposes of this Regulation,

1.1. ‘Rear fog lamp’ means a lamp used to make the vehicle more easily visible from the rear by giving a red signal of greater intensity than the rear position (side) lamps;

1.2. 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.

1.3. ‘Rear fog lamps of different types’ means lamps which differ in such essential respects as: (a) the trade name or mark; (b) the characteristics of the optical system, (levels of intensity, light distribution angles, category of filament lamp, light source module, etc.); (c) the variable intensity control, if any. A change of the colour of the filament lamp or the colour of any filter does not constitute a change of type.

1.4. References made in this Regulation to standard (étalon) filament lamp(s) and to Regulation No 37 shall refer to Regulation No 37 and its series of amendments in force at the time of application for type approval.

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. It shall specify, whether the device produces steady luminous intensity or whether the device produces variable luminous intensity.

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 rear fog lamp, the application shall be accompanied by:

2.2.1. drawings (three copies) in sufficient detail to permit identification of the type of the rear fog lamp and showing geometrically the position(s) in which the rear fog lamp may be fitted to 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;

2.2.2. a brief technical description stating, in particular, with the exception of lamps with non-replaceable light sources: (a) 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 (b) the light source module specific identification code; (c) for a rear fog lamp of category F2, a concise description of the variable intensity control.

2.2.3. two samples; if the rear fog lamp cannot be mounted indiscriminately on either 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. For a rear fog lamp of category F2, the application shall also be accompanied by the variable intensity control or a generator providing the same signal(s).

3. MARKINGS

The samples of a type of rear fog lamp submitted for approval shall:

3.1. bear the trade name or mark of the applicant; this marking must be clearly legible and be indelible;

3.2. with the exception of lamps with non-replaceable light sources bear a clearly legible and indelible marking indicating: — the category or categories of filament lamp prescribed; and/or — the light source module specific identification code.

3.3. provide adequate space for the approval mark and for the additional symbols prescribed in paragraph 4.3 below; the said space shall be shown in the drawings referred to in paragraph 2.2.1 above.

3.4. in the case of lamps with an electronic light source control gear or a variable intensity control and/or non-replaceable light sources and/or light source module(s), bear the marking of the rated voltage or range of voltage and rated maximum wattage.

3.5. in the case of lamps with light source module(s), the light source module(s) shall bear: 3.5.1. the trade name or mark of the applicant; this marking must be clearly legible and indelible; 3.5.2. the specific identification code of the module; this marking must be clearly legible and indelible. This specific identification code shall comprise the starting letters ‘MD’ for ‘MODULE’ followed by the approval marking without the circle as prescribed in paragraph 4.3.1.1 below and, in the case several non identical light source modules are used, followed by additional symbols or characters; this specific identification code shall be shown in the drawings mentioned in paragraph 2.2.1 above. The approval marking does not have to be the same as the one on the lamp in which the module is used, but both markings shall be from the same applicant. 3.5.3. the marking of the rated voltage or range of voltage and rated maximum wattage.

3.6. An electronic light source control gear or a variable intensity control being part of the lamp but not included into the lamp body shall bear the name of the manufacturer and its identification number.

4. APPROVAL

4.1. If the two samples of a type of rear fog lamp meet the requirements of this Regulation, approval shall be granted.

4.2. An approval number shall be assigned to each type approved; the number so assigned may not subsequently be assigned by the same Contracting Party to another type of rear fog lamp covered by this Regulation. The first two digits of the approval number shall indicate the most recent series of amendments incorporated in the Regulation at the time of issue of the approval. Notice of approval or of refusal of approval of a type of rear fog lamp shall be communicated to the Parties to the Agreement which apply this Regulation by means of a form conforming to the model in Annex 1 to this Regulation and of an attached drawing, supplied by the applicant for approval, in a format not exceeding A 4 (210 × 297 mm) and, if possible, on a scale of 1:1.

4.3. Every rear fog lamp conforming to a type approved under this Regulation shall bear in the space referred to in paragraph 3.3. above, in addition to the mark and the particulars prescribed in paragraphs 3.1 and 3.2 above:

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 approval (2); 4.3.1.2. an approval number;

4.3.2. the additional symbol ‘F’ followed by the figure ‘1’ when the device produces steady luminous intensity and by the figure ‘2’ when the device produces variable luminous intensity.

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 ‘F’.

4.4. The mark and the symbol referred to in paragraphs 4.3.1 and 4.3.2 shall be indelible and shall be clearly legible even when the rear fog lamp is fitted to the vehicle.

4.5. Independent lamps

If different types of lamps complying with the requirements of several Regulations, uses the same outer lens having the same or different colour, a single international approval mark may be affixed, consisting of a circle surrounding the letter ‘E’ followed by the distinguishing number of the country which has granted the approval, and an approval number. This approval mark may be located anywhere on the lamp, provided that:

4.5.1. It is visible after their installation.

4.5.2. 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 and if necessary, the required arrow shall be marked.

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. The main body of the lamp shall include the space described in paragraph 3.3 above and shall bear the approval mark of the actual function(s).

4.5.5. Model E in Annex 2 to this Regulation gives examples of an approval mark with the above-mentioned additional symbols.

4.6. When two or more lamps are part of the same unit of grouped, combined or reciprocally incorporated lamps, 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.

4.6.1. 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: 4.6.1.1. it is visible after their installation; 4.6.1.2. 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.

4.6.2. 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: 4.6.2.1. either on the appropriate light-emitting surface; 4.6.2.2. or in a group, in such a way that each lamp of the grouped, combined or reciprocally incorporated lamps may be clearly identified (see three possible examples in Annex 2).

4.6.3. 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.

4.6.4. 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.

4.7. Annex 2 gives examples of arrangements of approval marks for a single lamp (figure 1) and for grouped, combined or reciprocally incorporated lamps (figure 2) with all the additional symbols referred to above.

5. GENERAL SPECIFICATIONS

5.1. Each sample shall conform to the specifications set forth in the paragraphs below.

5.2. Rear fog 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) that each light source module can only be fitted in no other position than the designated and correct one and can only be removed with the use of tool(s); (b) If there are more than one light source module used in the housing for a device, light source modules having different characteristics can not be interchanged within the same lamp housing.

5.3.2. The light source module(s) shall be tamperproof.

5.4. In case of failure of the variable intensity control regulating the variable luminous intensity of a rear fog lamp of category F2 emitting more than the maximum value of category F or F1, requirements of steady luminous intensity of category F or F1 shall be fulfilled automatically.

5.5. In the case of replaceable filament lamp(s):

5.5.1. Any category or categories of filament lamp(s) approved according to Regulation No 37 may be used, provided that no restriction on the use is made in Regulation No 37 and its series of amendments in force at the time of application for type approval.

5.5.2. The design of the device shall be such that the filament lamp can be fixed in no other position but the correct one.

5.5.3. The filament lamp holder shall conform to the characteristics given in IEC Publication 60061. The holder data sheet relevant to the category of filament lamp used, applies.

6. INTENSITY OF LIGHT EMITTED

6.1. The intensity of the light emitted by each of the two samples shall be not less than the minima and not greater than the maxima specified below and shall be measured in relation to the axis of references in the directions shown below (expressed in degrees of angle with the axis of reference).

6.2. The intensity along the H and V axes, between 10° to the left and 10° to the right and between 5° up and 5° down, shall not be less than 150 cd.

6.3. The intensity of the light emitted in all directions in which the light(s) can be observed shall not exceed 300 cd for a device with steady luminous intensity (F or F1) and 840 cd for a device with variable luminous intensity (F2).

6.4. 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.

6.5. The variable intensity control shall not generate signals which cause luminous intensities:

6.5.1. outside the range specified in paragraphs 6.2 and 6.3 above and

6.5.2. exceeding the category F or F1 maximum specified in paragraph 6.3: (a) for systems depending only on daytime and night time conditions: under night time conditions; (b) for other systems: under standard conditions (3).

6.6. The apparent surface in the direction of the reference axis shall not exceed 140 cm2.

6.7. Annex 3 gives particulars of the measurement method to be used in case of doubt.

7. TEST PROCEDURES

7.1. All measurements, photometric and colorimetric, shall be made:

7.1.1. In the case of a lamp with replaceable light source, if not supplied by an electronic light source control gear or a variable intensity control, with an uncolored or colored standard filament lamp of the category prescribed for the device, supplied with the voltage necessary to produce the reference luminous flux required for that category of filament lamp,

7.1.2. In the case of a lamp equipped with non-replaceable light sources (filament lamps and other), at 6,75 V, 13,5 V or 28,0 V respectively.

7.1.3. In the case of a system that uses an electronic light source control gear or a variable intensity control, being part of the lamp (4) applying at the input terminals of the lamp the voltage declared by the manufacturer or, if not indicated, 6,75 V, 13,5 V or 28,0 V respectively.

7.1.4. In the case of a system that uses an electronic light source control gear or a variable intensity control, not being part of the lamp the voltage declared by the manufacturer shall be applied to the input terminals of the lamp.

7.2. The test laboratory shall require from the manufacturer the light source control gear or a variable intensity control needed to supply the light source and the applicable functions.

7.3. However in the case of a rear fog lamp of category f2 operated by a variable intensity control to obtain variable luminous intensity, photometric measurements shall be performed according to the applicant’s description.

7.4. The voltage to be applied to the lamp shall be noted in the communication form in Annex 1 of this Regulation.

7.5. For any lamp except those equipped with filament lamps, the luminous intensities, measured after one minute and after 30 minutes of operation, shall comply with the minimum and maximum requirements. The luminous intensity distribution after one minute of operation can be calculated from the luminous intensity distribution after 30 minutes of operation by applying at each test point the ratio of luminous intensities measured at HV after one minute and after 30 minutes of operation.

7.6. The limits of the apparent surface in the direction of the reference axis of a light-signalling device shall be determined.

8. HEAT RESISTANCE TEST

8.1. The lamp must be subjected to a one-hour test of continuous operation following a warm-up period of 20 minutes. The ambient temperature shall be 23 °C ± 5 °C. The lamp used shall be a lamp of the category prescribed for the lamp, and shall be supplied with a current at a voltage such that it gives the specified average power at the corresponding test voltage.

8.2. Where only the maximum power is specified, the test shall be carried out by regulating the voltage to obtain a power equal to 90 per cent of the specified power. The specified average or maximum power referred to above shall in all cases be chosen from the voltage range of 6, 12 or 24 V at which it reaches the highest value.

8.3. In the case of light sources operated by an electronic control gear to obtain variable luminous intensity, the test shall be carried out under the conditions given at minimum 90 per cent of the higher luminous intensity.

8.4. After the lamp has been stabilized at the ambient temperature, no distortion, deformation, cracking or colour modification shall be perceptible.

9. COLOUR OF LIGHT EMITTED

The colour of the light emitted inside the field of the light distribution grid defined at paragraph 3 of Annex 3, which shall be measured under conditions described in paragraph 7 above, shall be red.

Outside this field no sharp variation of colour shall be observed.

These requirements shall also apply within the range of variable luminous intensity produced by rear fog lamps of category F2.

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 subparagraph of paragraph 7.1 of this Regulation.

10. CONFORMITY OF PRODUCTION

The conformity of production procedures shall comply with those set out in Appendix 2 of the Agreement (E/ECE/324-E/ECE/TRANS/505/Rev.2) with the following requirements:

10.1. 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 9 above.

10.2. The minimum requirements for conformity of production control procedures set forth in Annex 4 to this Regulation shall be complied with.

10.3. The minimum requirements for sampling by an inspector set forth in Annex 5 to this Regulation shall be complied with.

10.4. The authority which has granted type approval may at any time verify the conformity control methods applied in each production facility. The normal frequency of these verifications shall be once every two years.

11. PENALTIES FOR NON-CONFORMITY OF PRODUCTION

11.1. The approval granted for a type of rear fog lamp may be withdrawn if the foregoing requirements are not complied with or if a rear fog lamp bearing the mark referred to in paragraphs 4.3.1 and 4.3.2 does not conform to the type approved.

11.2. If a Contracting Party to the Agreement which applies this Regulation withdraws an approval it has previously granted, it shall forthwith notify the other Contracting Parties which apply this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation.

12. PRODUCTION DEFINITELY DISCONTINUED

If the holder of the approval completely ceases to manufacture a type of rear fog lamp approved under this Regulation, he shall inform thereof the authority which granted the approval. Upon receiving the relevant communication, that authority shall inform the other Parties to the Agreement which apply this Regulation thereof, by means of a communication form conforming to the model in Annex 1 to this Regulation.

13. NAMES AND ADDRESSES OF TECHNICAL SERVICES CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS

The Contracting Parties to the Agreement which apply this Regulation shall communicate to the secretariat of the United Nations the names and addresses of the technical services conducting approval tests and of the administrative departments which grant approval and to which the forms certifying approval or refusal or withdrawal of approval, issued in other countries, are to be sent.

(1) 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).

(2) 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 rescriptions 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.

(3) Good visibility (meteorological optical range MOR > 2 000 m defined according to WMO, Guide to Meteorological Instruments and Methods of Observation, Sixth Edition, ISBN: 92-63-16008-2, pp 1.9.1/1.9.11, Geneva 1996.) and clean lens.

(4) For the purpose of this Regulation ‘being part of the lamp’ means to be physically included in the lamp body or to be external, separated or not, from the lamp body but supplied by the lamp manufacturer as part of the lamp system.

ANNEX 1 COMMUNICATION (Maximum format: A4 (210 × 297 mm))

ANNEX 2 ARRANGEMENT OF APPROVAL MARKS Figure 1 (Marking for single lamps) MODEL A Figure 2 (Simplified marking for grouped, combined or reciprocally incorporated lamps) (The vertical and horizontal lines schematize the shape of the light-signalling device. These are not part of the approval mark.) MODEL B MODEL C MODEL D Note: The three examples of approval marks, models B, C and D, 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 incorporated lamps. This approval mark shows that the device was approved in the Netherlands (E 4) under approval number 3333 and comprising: A rear direction indicator lamp producing variable luminous intensity (category 2b) approved in accordance with the 01 series of amendments to Regulation No 6, A red rear position (side) lamp producing variable luminous intensity (R2) approved in accordance with the 02 series of amendments to Regulation No 7, A rear fog lamp producing variable luminous intensity (F2) approved in accordance with Regulation No 38 in its original version, A reversing lamp (AR) approved in accordance with Regulation No 23 in its original version, A stop-lamp producing variable luminous intensity (S2) approved in accordance with the 02 series of amendments to Regulation No 7. MODEL E Marking of independent lamps Figure 3 Light source modules

ANNEX 3 PHOTOMETRIC MEASUREMENTS 1. When photometric measurements are taken, stray reflexions shall be avoided by appropriate masking. 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: 2.1. the distance of measurement shall be such that the law of the inverse of the square of the distance is applicable; 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°; 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. 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 of the field of the reference axis specified by the manufacturer. 4. If visual examination of a light appears to reveal substantial local variations of intensity, a check shall be made to ensure that, outside the axes, no intensity measured within the rhombus defined by the extreme directions of measurement is below 75 cd (see diagram below). 5. Photometric measurement of lamps equipped with several light sources The photometric performance shall be checked: 5.1. For non-replaceable light sources (filament lamps and other): With the light sources present in the lamp, in accordance with paragraph 7.1. of this Regulation. 5.2. For replaceable filament lamps: When equipped with filament lamps at 6,75 V, 13,5 V or 28,0 V, the luminous intensity values produced shall be corrected. The correction factor is the ratio between the reference luminous flux and the mean value of the luminous flux found at the voltage applied (6,75 V, 13,5 V or 28,0 V). The actual luminous fluxes of each filament lamp used shall not deviate more than ± 5 per cent from the mean value. Alternatively a standard filament lamp may be used in turn, in each of the individual positions, operated at its reference flux, the individual measurements in each position being added together.

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 per cent 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 filament lamp. 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. 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 lamps shall be selected at random from the production of a uniform batch. A uniform batch means a set of lamps 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 lamp shall be subjected to photometric measurements for the minimum values at the points listed in Annex 3 and for the required chromaticity coordinates. 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 verification of conformity of products in paragraph 10.1 of this Regulation. The criteria governing the acceptability shall be such that, with a confidence level of 95 per cent, the minimum probability of passing a spot check in accordance with Annex 5 (first sampling) would be 0,95.