13Where a designation applies this paragraph to any person, that person shall have the following powers in the relevant police area—
(a)the power to carry out any road check the carrying out of which by a police officer is authorised under section 4 of the 1984 Act (road checks); and
(b)for the purpose of exercising that power, the power conferred by section 163 of the Road Traffic Act 1988 (c. 52) (power of police to stop vehicles) on a constable in uniform to stop a vehicle.