– combinations of vehicles where the tractor vehicle is in category D1 and its trailer has a maximum authorised mass of over than 750 kg, provided that that the maximum authorised mass of the combination thus formed does not exceed 12 000 kg , and that the maximum authorised mass of the trailer does not exceed the unladen mass of the tractor vehicle ;
- transportlīdzekļu savienojums, kas sastāv no D1 kategorijas vilcēja un piekabes, kuras pilna masa pārsniedz 750 kg, ja šī savienojuma pilna masa nepārsniedz 12 000 kg un piekabes pilna masa nepārsniedz vilcēja pašmasu ;