Document ID: chunk:federal_register_of_legislation:F2023C00154:reg:1:p4
Version: federal_register_of_legislation:F2023C00154
Segment Type: reg
Provision Reference: reg 1 (pt 4/15)
Character Range: 106856–109840

of the absolute values recorded on both samples shall not exceed 3.0 mrad.
     1.4. The chromaticity coordinates shall comply with paragraph 7. of this Regulation. The photometric performance of a front fog lamp emitting an enlarged selective yellow light when equipped with a colourless light source shall be the values contained in this Regulation multiplied by 0.84.
     2. Minimum requirements for verification of conformity by the manufacturer
     For each type of front fog 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 characteristics and the verification of the change in vertical position of the cut-off line under the influence of heat.
     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. above 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 front fog lamps shall be selected at random from the production of a uniform batch. A uniform batch means a set of front fog 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 front fog lamp shall be subjected to photometric measurements at the points provided for in the Regulation, the reading being limited to points listed in Annex 2 to this Regulation depending on the prevailing class of front fog lamps.
     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