S.L. 65.21 ст. 4Classification of goods vehicles.

Goods vehicles shall be classified in the following categories:

CATEGORY N

Motor vehicles with at least four wheels used for the carriage of goods

- N1 - Vehicles used for the carriage of goods and having a maximum mass not exceeding 3.5 tonnes; - N2 - Vehicles used for the carriage of goods and having a maximum mass exceeding 3.5 tonnes but not exceeding 12 tonnes; - N3 - Vehicles used for the carriage of goods and having a maximum mass exceeding 12 tonnes.

In the case of a towing vehicle designed to be coupled to a semi-trailer or centre-axle trailer, the mass to be considered for classifying the vehicle is the mass of the tractor vehicle in running order, increased by the mass corresponding to the maximum static vertical load transferred to the tractor vehicle by the semi-trailer or centre-axle trailer and, where applicable, by the maximum mass of the tractor vehicle’s own load.