9.—(1) Subject to paragraph (2) any person on whom power is conferred by virtue of regulation 8 may seize anything (if necessary by detaching it from a vehicle) and detain it as evidence of the commission of an offence under section 55(4) or (5) of the Act.
(2) The power conferred by paragraph (1) shall not be exercised by an authorised person who is not a constable.