An authorised officer may, for advice purposes, enter a relevant place if--
(a) an occupier of the place consents under Division 4 to the entry and section 503 has been complied with for the occupier; or
(b) the place is not a residence and is--(i) open for carrying on a business; or(ii) otherwise open for entry; or(iii) required to be open for inspection under this Law.