6. Dutiable goods shall not be brought by post into the United Kingdom from a place situated outside the United Kingdom and the Isle of Man for delivery in the United Kingdom or the Isle of Man except:—
(a)in a parcel, a letter packet, a small packet or a datapost packet; or
(b)in a printed packet, provided that the goods are of such a description as to be transmissible in such a packet under paragraph 22 of the Post Office Overseas Letter Post Scheme 1982.