In the case of a tractor unit for semi-trailer, the maximum mass to be considered for classifying the vehicle shall include the maximum mass of the semi-trailer borne by the fifth wheel coupling.
I gcás aonad tarracóra le haghaidh leathleantóra, déanfar uasmhais an leathleantóra a iompraíonn cúplán an chúigiú rotha a chur san áireamh san uasmhais a gcinnfear catagóiriú na feithicle ar a bonn.