(1) An operator of a heavy vehicle is a person who is responsible for controlling or directing the operations of -
(a) in the case of a vehicle (including a vehicle in a combination) - the vehicle; or
(b) in the case of a combination - the towing vehicle in the combination.
(2) A person is not an operator merely because she or he -
(a) owns a vehicle or combination; or
(b) drives a vehicle or combination; or
(c) maintains, or arranges for the maintenance of, a vehicle or combination; or
(d) arranges for the registration of a vehicle.