‘category S1’ comprises interchangeable towed equipment, the sum of the technically permissible masses per axle of which does not exceed 3500 kg;
cuimsíonn “earnáil S1” trealamh idirmhalartaithe ar tarraingt nach sáraíonn suim na maiseanna atá ceadaithe go teicniúil in aghaidh an acastóra 3500 kg;