What are the rules about carrying bikes on the back of a vehicle?
It is legal to use a bike rack on a vehicle, but it is illegal to obscure the vehicle’s number plate and rear warning lights, because this would be in breach of Regulation 25 of the Road Traffic (Licensing) Regulations 1975. The WA Traffic Code 2000 regulation 25 states: Number plate to be fixed on vehicle (1) The owner or person in charge of a vehicle shall rigidly fix and keep the identification tablet or number plates of the vehicle thereon so that: (a) in the case of a motor cycle or a trailer or jinker, the identification tablet or number plate is fixed and kept in a conspicuous place on the back of the vehicle, in an upright position and so that the characters thereon are clearly visible and legible, by day and by night; (b) in the case of a motor vehicle not referred to in paragraph (a), where the identification tablet or number plate is duplicated, one is fixed and kept in a conspicuous place in front, and one is fixed and kept in a conspicuous place on the back of the vehicle,
