(1) In this regulation agricultural implement means an implement that is built to (a) be towed by a motor vehicle; and(b) perform agricultural tasks;agricultural machine means an agricultural machine as defined in the Vehicle and Traffic (Driver Licensing and Vehicle Registration) Regulations 2000 .(2) For the purposes of section 29(1AA) of the Act, the following kinds of trailer are prescribed:(a) a trailer, other than a caravan, with an unladen mass of not more than half a tonne;(b) an agricultural implement towed by another motor vehicle;(c) a trailer towed by an agricultural machine operating as an agricultural machine.