1.1. This Regulation applies to the representation of the curve as a function of engine or motor speed of the power at full load indicated by the manufacturer for internal combustion engines or electric drive trains and the maximum 30 minutes power of electric drive trains intended for the propulsion of motor vehicles of categories M and N 1 . 1.2. The internal combustion engines belong to one of the following categories: Reciprocating piston engines (positive-ignition or compression-ignition), but excluding free piston engines; Rotary piston engines (positive-ignition or compression ignition); Naturally aspirated or supercharged engines. 1.3. The electric drive trains are composed of controllers and motors and are used for propulsion of vehicles as the sole mode of propulsion.