18. A trailer or semi-trailer leased for a period not exceeding 12 months is exempt from registration if the following conditions are met:(1) the leasing contract is entered into outside Québec;
(2) its owner is not required to hold a leasing permit from the Commission des transports du Québec;
(3) it is in the possession of the lessee;
(4) its net mass is 900 kg or less.