Vehicles in category N with load surfaces: 2.3.1. The angle of the light beam from the dipped-beam headlamps must be determined under the following loading conditions; 2.3.1.1. vehicle unladen and one person in the driver's seat; 2.3.1.2. driver, plus a load so distributed as to give the maximum technically permissible load on the rear axle or axles, or the maximum permissible mass of the vehicle, whichever occurs first, without exceeding a front axle load calculated as the sum of the front axle load of the unladen vehicle plus 25 per cent of the maximum permissible payload on the front axle. Conversely, the front axle is so considered when the load platform is at the front.
