Highway Traffic Act, R.S.O. 1990, c. H. 8
13. (1) No number other than that upon the number plate furnished by the Ministry shall be exposed on any part of a motor vehicle or trailer in such a position or manner as to confuse the identity of the number plate. R.S.O. 1990, c. H.8, s. 13 (1).
(2) Every number plate shall be kept free from dirt and obstruction and shall be affixed so that the entire number plate, including the numbers, is plainly visible at all times, and the view of the number plate shall not be obscured or obstructed by spare tires, bumper bars, any part of the vehicle, any attachments to the vehicle or the load carried. 1994, c. 27, s. 138 (7).
(3) The number plates shall not be obstructed by any device that prevents the entire number plates including the numbers from being accurately photographed using a photo-radar system. 1993, c. 31, s. 2 (5).
(3.0.1) The number plates shall not be obstructed by any device that prevents the entire number plates including the numbers from being accurately photographed using a red light camera system. 1998, c. 38, s. 2 (1).
(3.1) The number plates shall not be obstructed by any device or material that prevents the entire number plates including the numbers from being identified by an electronic toll system. 1996, c. 1, Sched. E, s. 2 (1).
(4) Every person who contravenes subsection (2), (3), (3.0.1) or (3.1) is guilty of an offence. 1993, c. 31, s. 2 (5); 1996, c. 1, Sched. E, s. 2 (2); 1998, c. 38, s. 2 (2)
I'll be interested to see how this plays out for you. We discussed this in the office and felt that the charge applied when something was in front of the plate like a cover or a bicycle rack but that peeling numbers werent enough.