(1) Stores shall be produced to the proper officer before being put on board an aircraft or a ship and, upon being put on board, shall not be taken into use without the express permission of the proper officer until the aircraft or ship has left the country.

(2) Sub-regulation (1) does not apply to a ship of war.

(3) Despite sub-regulation (1), duty-paid stores on which no drawback is claimed and stores which are not subject to import duty may be taken into immediate use.