package is locked and the keys thereof are not produced on demand, may open such room, place, safe, chest, box or package in any manner. (Amended A.5/1991.) (9) An officer may require any person to appear before him at any time and place stipulated by the officer and may then and there question such person, either alone or in the presence of any other person, as he thinks fit, with respect to any matter dealt with in this Act. (10)An officer may question any person (either alone or in the presence of another, as he thinks fit) in respect of any matter dealt with in this Act if he — (a) finds such person on premises entered in terms of this section; or (b) has reasonable grounds for believing such person to be, or to have been employed on premises, or in possession, custody, or control of anything in respect of which this Act is applicable. (11)An officer may stop and board any vehicle and may search any such vehicle or any person found therein or thereon for goods upon which duty has not been paid, or in respect of which he has reasonable cause to believe that there has been a contravention of this Act, and may in pursuance of his duties remain on such vehicle unhindered. (12)Any officer may stop any person whom he has reason to suspect of having secreted about him or in his possession dutiable goods or goods in respect of which this Act has been contravened and he may search such person. (13)Any person may, before being searched in terms of this section, require the officer concerned to take him before the controller who may in his discretion discharge that person or direct that he be searched: Provided that this subsection shall only apply if such person is stopped within an airport control area and during the prescribed working hours of the controller. (14)A female shall only be searched by a female. (15)If in pursuance of his duties under subsection (8) or (11) the officer finds any room, cabin, place, safe, chest, box or package to be locked and the keys thereof are not produced on demand he may open it in any manner. (16)Any officer may lock up, seal, mark or fasten or otherwise secure any warehouse, store, room, cabin, place, vessel, appliance, utensil, fitting, vehicle or goods if he has reason to believe that this Act has been or is likely to be contravened in respect thereof or in connexion therewith. PART III IMPORT, EXPORT AND TRANSIT OF GOODS