Part I:Safety requirements with respect to the electric power train of road vehicles of Categories M and N'), with a maximum design speed exceeding 25km/h, equipped with one or more traction motor(s) operated by electric power and not permanently connected to the grid, as well as their high voltage components and systems which are galvanically connected to the high voltage bus of the electric power train.Part I of this requlation does not cover post-crash safety requirements of road vehicles.Part Il:Safety requirements with respect to the Rechargeable Electrical Energy Storage System (REESS), of road vehicles of Categories M and N equipped with one or more traction motors operated by electric power and not permanently connected to the grid.Part Il of this Regulation does not apply to REESS(s) whose primary use is to supply power for starting the engine and/or lighting and/or other vehicle auxiliaries systems.