Regulation 5 Statement on entry
If—
(a)
an inspector questions a person on the premises under section 317(1)(b), and
(b)
that person refuses to answer the question,
the inspector must orally inform the person that he is exercising a power to question under section 317(1)(b) and that it is an offence under section 326 if, without reasonable excuse, a person obstructs, or fails to cooperate with, an inspector who is exercising or seeking to exercise a power under or by virtue of Part 15.