Document ID: chunk:federal_register_of_legislation:F2023C00142:front:0:p8
Version: federal_register_of_legislation:F2023C00142
Segment Type: other
Provision Reference: 
Character Range: 21490–24273

the different types of headlamps or units of lamps, provided that the main body of the headlamp, even if it cannot be separated from the lens, also comprises the space described in paragraph 3.2. above and bears the approval marks of the actual functions.

       If different types of headlamps comprise the same main body, the latter may bear the different approval marks.

       4.3.3.2. Annex 2, Figure 11, to this Regulation gives examples of arrangements of approval marks relating to the above case.

       B. TECHNICAL REQUIREMENTS FOR HEADLAMPS [6/]

       5. GENERAL SPECIFICATIONS

       5.1. Each sample shall comply with the specifications set forth in paragraphs 6. to 8. below.

       5.2. Headlamps shall be so made as to retain their prescribed photometric characteristics and to remain in good working order when in normal use, in spite of the vibrations to which they may be subjected.

       5.2.1. Headlamps shall be fitted with a device enabling them to be so adjusted on the vehicle as to comply with the rules applicable to them. Such a device need not be fitted on units in which the reflector and the diffusing lens cannot be separated, provided the use of such units is confined to vehicles on which the headlamps setting can be adjusted by other means.

       Where a headlamp providing a passing beam and a headlamp providing a driving beam, each equipped with its own light source(s), are assembled to form a composite unit, the adjusting device shall enable each optical system individually to be duly adjusted. The same provision applies to headlamps providing a front fog lamp beam and a driving beam, and to headlamps providing a passing beam and a front fog lamp beam, and to headlamps providing these three beams.

       5.2.2. However, these provisions shall not apply to headlamp assemblies whose reflectors are indivisible. For this type of assembly, the requirements of paragraph 6.3. of this Regulation shall apply.

       5.3. In the case when gas-discharge light source replacement can be carried out without tools, the lamp holder shall conform to the dimensional characteristics as given on the data sheet of IEC Publication 61-2, relevant to the category of gas-discharge light source used. The gas-discharge light source must fit easily into the headlamp.

       5.4. Headlamps designed to satisfy the requirements of both right-hand and of left-hand traffic may be adapted for traffic on a given side of the road either by an appropriate initial setting when fitted on the vehicle or by selective setting by the user.  Such initial or selective setting may consist, for example, of fixing either the optical unit at a given angle on the vehicle or the light source(s) at a given angle in relation to the optical unit. In all