47.—(1) A person shall not drive a mechanically propelled vehicle at a speed exceeding a speed limit applying in relation to the vehicle.

(2) A person who contravenes subsection (1) of this section shall be guilty of an offence.

(3) In this section "speed limit" means a limit which is—

( a ) an ordinary speed limit,

( b ) the built-up area speed limit, or

( c ) a special speed limit.