Where the conditions set out in section 162(1) above are satisfied in relation to any premises, any person designated in writing for the purpose by the relevant undertaker in question may enter those premises, or any land occupied with those premises, for any of the purposes specified in subsection (2) below.
The purposes mentioned in subsection (1) above are—
Part II of Schedule 6 to this Act shall apply in relation to the rights and powers conferred by the preceding provisions of this section.
Where any meter or other recording apparatus is provided in any premises in pursuance of Chapter III of Part IV of this Act for the purpose of assessing any charge, a sewerage undertaker may (instead of exercising its powers under this section) for the purpose of reading that meter or apparatus exercise the power conferred by section 171 above as if that purpose were included in the purposes mentioned in subsection (1) of that section.