s 73A Power of authorised officers of Department to stop vehicles
(1) An authorised officer may require any person driving a vehicle on a road or other public place to stop, and any person who fails to stop when he is so required shall be guilty of an offence and liable on summary conviction to a fine not exceeding level 5 on the standard scale. (2) In this Article — “ authorised officer ” means an officer of the Department who is authorised in writing for the purposes of this Article; “ public place ” has the same meaning as in the Road Traffic (Northern Ireland) Order 1981 ( NI 1).