Article 5 4.

The zero- and low-emission factor shall reduce the average specific CO2 emissions of a manufacturer by a maximum of 3 %. The contribution to that factor of the zero-emission heavy-duty vehicles of category N, other than those in vehicle sub-groups 4-UD, 4-RD, 4-LH, 5-RD, 5-LH, 9-RD, 9-LH, 10-RD or 10-LH, shall reduce the average specific CO2 emissions of a manufacturer by a maximum of 1,5 %.