Document ID: chunk:federal_register_of_legislation:F2023C00140:body:0:p10
Version: federal_register_of_legislation:F2023C00140
Segment Type: other
Provision Reference: 
Character Range: 27423–30554

the apparent surface in the direction of the reference axis of a light-signalling device shall be determined.
11.                                      Heat resistance test
11.1.                                The daytime running lamp shall 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°.  The light source used shall be a light source of the category specified for the daytime running lamp, and shall be supplied with a current at a voltage such that it gives the specified average power at the corresponding test voltage.  However, for daytime running lamps equipped with non-replaceable light sources (filament lamps and other), the test shall be made with the light sources present in the daytime running lamp, in accordance with paragraph 10.2. of this Regulation.
11.2.                                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; for daytime running lamps equipped with non-replaceable light sources (filament lamps and other) the test conditions set in paragraph 10.2. of this Regulation shall be applied.
11.3.                                After the daytime running lamp has been stabilized at the ambient temperature, no distortion, deformation, cracking or colour modification shall be perceptible.  In case of doubt the intensity of light according to paragraph 7. above shall be measured.  At that measurement the values shall reach at least 90 per cent of the values obtained before the heat resistance test on the same device.
12.                                      Modifications of a type of daytime running lamp and extension of approval
12.1.                                Every modification of the type of daytime running lamp shall be notified to the Administrative Departments which approved the type of daytime running lamp.  The department may then either:
12.1.1.                          Consider that the modifications made are unlikely to have an appreciable adverse effect and that in any case the daytime running lamp still complies with the requirements; or
12.1.2.                          Require a further test report from the Technical Service responsible for conducting the tests.
12.2.                                Confirmation or refusal of approval, specifying the alterations shall be communicated by the procedure specified in paragraph 5.1.4. above to the Parties to the Agreement applying this Regulation.
12.3.                                The Type Approval Authority issuing the extension of approval shall assign a series number for such an extension and inform thereof the other Parties to the Agreement applying this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation.
13.                                      Conformity of production
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