A CTP policy has the following subjects:
(a) the motor vehicle that is being registered, or the registration of which is being renewed, when the CTP insurer for the CTP policy is selected under Part 2.3 (Selecting a CTP insurer);
(b) a trailer or anything else that—
(i) is attached to the vehicle; or
(ii) becomes detached from the vehicle and runs out of control;
(c) anything else prescribed by regulation.