15. Power of entry.

(a) making any enquiry, inspection, measurement or survey or taking level for such land building;
(b) examining works under construction and ascertaining the course of sewers and drains;
(c) digging or boring into the sub-soil;
(d) setting out boundaries and intended lines of works.
(e) making such levels, boundaries and lines by placing marks and cutting trenches;
(f) ascertaining whether any land is being or has been developed in contravention of any plan or scheme or in contravention of any conditions subject to which such permission has been granted; or
(g) doing any other thing necessary for the efficient administration of this Act: