11. (1) No person or vehicle shall enter or leave a customs area, port or airport and no goods, whether dutiable or not, shall be brought into or out of any such area, port or airport except through an entrance or exit appointed in accordance with section 9.

(2) No person shall enter any part of a customs area, port or airport when forbidden to do so by an officer, nor remain in such an area or port, or any part thereof, when requested to leave the area or port, or part thereof, by an officer.

(3) A person or vehicle entering or leaving, or goods which are being brought into or out of, a customs area, port or airport may be detained by an officer for the purposes of search or examination.

(4) A person who contravenes this section shall be guilty of an offence and liable to a fine not exceeding twenty thousand shillings and any goods in respect of which the offence has been committed shall be liable to forfeiture.