11Inspections by sanitary authority
(1)A person duly authorised in writing by a sanitary authority may, on producing, if so required, evidence of his authority, enter at all reasonable hours any land for the purpose of determining
(a)whether; and if so, in what manner, the power conferred by subsection (1) of section three of this Act is to be exercised as respects that land or whether there has been a failure to comply, as respects that land, with the requirements of a notice under that subsection; or
(b)whether, and if so, in what manner, the power conferred by section five of this Act is to be exercised as respects a sanitary convenience on that land, or whether there has been a failure to comply, as respects a sanitary convenience on that land, with the requirements of a notice under that section:
Provided that admission shall not be demanded under this subsection to a dwelling-house unless twenty-four hours' notice of the intended entry has been given to the occupier of the house.
(2)A person who obstructs a person acting in the exercise of his powers under this section shall be guilty of an offence.