Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:1:p14
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 1 (pt 14/35)
Character Range: 481823–484586

5.9.1. the device is strong enough to withstand 50,000 operations without suffering damage despite the vibrations to which it may be subjected in normal use;

        5.9.2. in the case of failure the illumination above the line H-H shall not exceed the values of a passing beam according to paragraph 6.2.5.; in addition, on headlamps designed to provide a passing and/or a driving beam to become a bend lighting, a minimum illumination of at least 5 lux shall be fulfilled in test point 25 V (VV line, D 75 cm).

        5.9.3. either the passing beam or the driving beam shall always be obtained without any possibility of the mechanism stopping in between two positions;

        5.9.4. the user cannot, with ordinary tools, change the shape or position of the moving parts.

        6. ILLUMINATION

        6.1. General provisions

        6.1.1. Headlamps shall be so made that they give adequate illumination without dazzle when emitting the passing beam, and good illumination when emitting the driving beam.

        6.1.2. The illumination produced by the headlamp shall be determined by means of a vertical screen set up 25 m forward of the headlamp and at right angles to its axes as shown in Annex 3 to this Regulation.

        6.1.3. The headlamps shall be checked by means of an uncoloured standard (étalon) filament lamp designed for a rated voltage of 12 V.  During the checking of the headlamp, the voltage at the terminals of the filament lamp shall be regulated so as to obtain the reference luminous flux as indicated at the relevant data sheet of Regulation No. 37.

        6.1.4.                         The headlamp shall be considered acceptable if it meets the requirements of this paragraph 6 with at least one standard (étalon) filament lamp, which may be submitted with the headlamp.

        6.2. Provisions concerning passing beams

        6.2.1. The passing beam must produce a sufficiently sharp "cut-off" to permit a satisfactory adjustment with its aid. The "cut-off" must be a horizontal straight line on the side opposite to the direction of the traffic for which the headlamp is intended; on the other side, it must not extend beyond either the broken line HV H1 H4 formed by a straight line HV H1 making a 45° angle with the horizontal and the straight line H1 H4, 25 cm above the straight line hh, or the straight line HV H3, inclined at an angle of 15° above the horizontal (see Annex 3).  A cut-off extending beyond both line HV H2 and line H2 H4 and resulting from a combination of the two above possibilities shall in no circumstances be permitted.

        6.2.2. The headlamp shall be so aimed that:

        6.2.2.1. in the case of headlamps designed to meet the requirements of right-hand traffic, the "cut-off"