Document ID: chunk:federal_register_of_legislation:F2023C00136:reg:113:p15
Version: federal_register_of_legislation:F2023C00136
Segment Type: reg
Provision Reference: reg 113 (pt 15/21)
Character Range: 55068–58059

the part of the lamp not hidden by obstacles still conforms to the photometric values prescribed for the approval of the device.
5.20.4. When the vertical angle of geometric visibility below the horizontal may be reduced to 5 degrees (lamp at less than 750 mm above the ground, measured according to the provisions of paragraph 5.7.) the photometric field of measurements of the installed optical unit may be reduced to 5 degrees below the horizontal.
5.20.5. In the case of an interdependent lamp system, the geometric visibility requirements shall be fulfilled when all its interdependent lamps are operated together.

         6. INDIVIDUAL SPECIFICATIONS

6.1 riving-beam headlamp
6.1.1. Number:
6.1.1.1. For motorcycles having a cylinder capacity ≤ 125 cm3
         One or two of approved type according to:
         (a) Class C, D or E of Regulation No. 113;
         (b) Regulation No. 112;
         (c) Regulation No. 1;
         (d) Regulation No. 8;
         (e) Regulation No. 20;
         (f) Regulation No. 57;
         (g) Regulation No. 72;
         (h) Regulation No. 98.
6.1.1.2. For motorcycles having a cylinder capacity > 125 cm3
         One or two of approved type according to:
         (a) Class D or E of Regulation No. 113;
         (b) Regulation No. 112;
         (c) Regulation No. 1;
         (d) Regulation No. 8;
         (e) Regulation No. 20;
         (f) Regulation No. 72;
         (g) Regulation No. 98.
         Two of approved type according to:
         (h) Class C of Regulation No. 113.
6.1.2. Arrangement
No special requirement.
6.1.3. Position
         6.3.3.1. Width
6.1.3.1.1.              An independent driving lamp may be fitted above or below or to one side of another front lamp: if these lamps are on top of the other the reference centre of the driving lamp must be located within the medium longitudinal plane of the vehicle; if these lamps are side by side their reference centre must be symmetrical in relation to the median longitudinal plane of the vehicle.
6.1.3.1.2.              A driving-beam headlamp, that is reciprocally incorporated with another front lamp, must be fitted in such a way that its reference centre lies within the median longitudinal plane of the vehicle. However, when the vehicle is also fitted with an independent principal passing-beam headlamp, or a principal passing-beam headlamp that is reciprocally incorporated with a front position lamp alongside the driving-beam headlamp, their reference centres must be symmetrical in relation to the median longitudinal plane of the vehicle.
6.1.3.1.3.              Two driving lamps of which either one or both are reciprocally incorporated with another front lamp must be fitted in such a way that their reference centres are symmetrical in relation to the median longitudinal plane of the vehicle.
         6.1.3.2. The length: at the front of the vehicle. This requirement is regarded as satisfied if the light emitted does not cause discomfort to the driver