(1) Any person in charge of any vehicle or other conveyance, in or on which excisable products are being transported or in or on which it is reasonably believed by an officer that excisable products are being transported, shall stop such vehicle or other conveyance at the request of the said officer and shall produce to such officer any accompanying document, duty document or other document to which section 111 refers.
(2) Where a person in charge of any vehicle or other conveyance stops such a vehicle or other conveyance at the request of an officer, he shall allow the officer to carry out such searches of the vehicle or conveyance as appear to the said officer to be necessary to establish that any excisable products being transported therein correspond in every material respect with the description of any such excisable products contained in the documents referred to in subsection (1).
(3) Where, following the searches referred to in subsection (2), an officer discovers any mate