"inspector"

means any person who under or by virtue of section 22 has been appointed as or designated to be an inspector for the purposes of this Act, as well as—

(a)	any police official as defined in section 1(1) of the Criminal Procedure Act, 1977 (Act No. 51 of 1977), holding the rank of sergeant or a higher rank;

(b)	the Commissioner for Customs and Excise and any official contemplated in section 15(9), in performing their functions in the circumstances contemplated in section 15(4);