propelled with an external combustion engine, a turbine or a rotary piston engine, whereby, for the purpose of complying with environmental and functional safety requirements, a vehicle equipped with such a propulsion is considered the same as a vehicle propelled with a PI internal combustion engine;
feithicil faoi thiomáint innill dócháin sheachtraigh, tuirbín, innill loine rothlaigh, lena meastar, chun críocha ceanglais maidir leis an gcomhshaol agus maidir le sábháilteacht fheidhmiúil a chomhlíonadh, gur mar a chéile feithicil atá feistithe le modh tiomána den sórt sin agus feithicil faoi thiomáint innill dócháin inmheánaigh PI;