A vehicle (such as a rural mail-delivery car) is equipped with right-hand drive. What does HTA Section 63 require, unless the vehicle has a specific mechanical or electrical turn-signal device instead?

Correct answer: B. A rear label reading "RIGHT HAND DRIVE VEHICLE" in contrasting letters at least 50 mm tall

Section 63 requires a right-hand-drive vehicle to have "prominently displayed on the rear thereof, in bold face letters of not less than 50 millimetres in height and of a colour which is in contrast to that of the vehicle, the words 'RIGHT HAND DRIVE VEHICLE'" — a rear warning label sized specifically at 50 mm or taller, unless the vehicle instead has the mechanical/electrical signal device the Act describes elsewhere.

Source: MTO Driver's Handbook: Highway Traffic Act, Section 63 — right-hand-drive vehicles