(1) The Minister may make regulations prescribing a speed limit in respect of all public roads, or all public roads with such exceptions as may be specified in the regulations, for any class of mechanically propelled vehicles.
(2) Regulations under this section prescribing a speed limit for a class of vehicle may except any sub-class of the class from the speed limit.
(3) In this Act "ordinary speed limit" means a speed limit under regulations under this section.