规定了一种测量摩托车近光光束倾斜度相对于其初始倾斜度变化的方法，该倾斜度是由装载引起的车辆姿态变化引起的。适用于两轮摩托车。

Specifies a method of measuring the variation of motorcycle dipped beam inclination, with respect to its initial inclination, caused by the changes in vehicle attitude due to loading. Applies to two-wheeled motorcycles.