If an authorised officer of a council has reason to suspect that any vehicle or container contains any food—
he may examine the contents of the vehicle or container, subject to subsections (4) and (5).
For that purpose the officer may, if necessary, detain the vehicle or container.
If the officer finds any food which appears to him to be intended for, but unfit for, human consumption, he may deal with it as food falling within section 9(1), and subsections (2) to (4) of that section shall apply accordingly.
Nothing in this section authorises the detention of—
Where the duties of an officer of customs and excise with respect to any goods have not been wholly discharged, nothing in this section authorises the examination of those goods without his consent.