185Requirements about coupling trailers

185 Requirements about coupling trailers (a) the person uses, or permits to be used, on a road a heavy combination; and (b) a trailer in the combination is not securely coupled to the vehicle in front of it. (2) A person commits an offence if— (a) the person uses, or permits to be used, on a road a heavy combination; and (b) the components of a coupling used between vehicles in the heavy combination are not compatible with, or properly connected to, each other.

coupling means a device used to couple a vehicle in a combination to the vehicle in front of it.