The Regulations regarding new vehicle categories for driver licensing purposes which came into effect on 19 January 2013 are set out in the Road Traffic (Licensing of Drivers)(Amendment)(No.2) Regulations of 2011 (S.I. No. 483 of 2011). These represent the transposition into Irish law of EU legislation, specifically parts of Directive 2006/126/EC.
Category W is defined as 'work vehicles and land tractors'. The Regulations also state that a combination of vehicles consisting of a drawing vehicle in category W shall be considered to be a vehicle in category W. There is no reference to a weight limit. Provided the trailer or drawn component is itself legal, there is therefore no limit set to the weight of such trailer or drawn component which may be drawn by a vehicle in category W. There is a minimum age of 16 for a person to hold a learner permit or licence in category W. This is the only age restriction regarding category W.