Power of entry on building or land.

The Authority may authorise any person to enter into or upon any site of building with or without assistants or workmen, for the purpose of— (a) making any inquiry, inspection, measurement or survey, or taking levels of such site or building ; (b) examining works under construction or ascertaining the course of sewers or drains ; (c) ascertaining whether any site is being or has been developed, or any building is being or has been erected, in contravention of any direction issued under section 6 or without the permission referred to in section 7 or in contravention of any condition subject to which such permission has been granted ; or (d) ascertaining whether any land is being or has been used for the purposes of a charcoal-kiln, pottery-kiln or lime-kiln without a licence or in contravention of any condition subject to which such licence has been granted: Provided that no entry shall be made except between the hours of sun-rise and sun-set and without giving not less than twenty-four hours written notice to the occupier, or if there be no occupier, to the owner of the building or land.