Number Plates

A South African Bureau of Standards (SABS) approve number plate shall be affixed - (a) in such a manner that it is not easily detachable; (b) in an upright position or within 30 degrees of such position; (c) in such a manner that each letter and figure thereon is clearly legible; (d) in such a manner that the whole number plate is clearly visible; (e) to the back of a motor cycle, motor tricycle,

Source: Rules manual §6.8