[Category] B [Category_2] B1 [Description_3] Motor tricycles and quadricycles [Description] 
Motor vehicles, other than those in category A, having a permissible maximum mass not exceeding 3,500 kg and not more than eight seats in addition to the driver's seat; or motor vehicles of category В coupled to a trailer the permissible maximum mass of which does not exceed 750 kg; or motor vehicles of category В coupled to a trailer the permissible maximum mass of which exceeds 750 kg but does not exceed the unladen mass of the motor vehicle, where the combined permissible maximum mass of the vehicles so coupled does not exceed 3,500 kg