In the performance of their functions, designated personnel may, with either the consent
of the occupant or other authorized person, or with a valid inspection warrant, enter
upon property and make examinations and surveys in a manner consistent with the consent
or the inspection warrant. In cases where no inspection warrant is obtained, designated
personnel in the performance of their functions may enter upon property open to the
general public and may enter upon property by way of a route normally accessible to
visitors or tradespeople, or other persons having legitimate business with the occupants,
in order to seek consent to inspect the property.