None of the persons mentioned in subsection (2) below is to have any liability to an occupier or owner of land for damages or otherwise (whether at common law or otherwise) arising out of anything done or omitted to be done in the exercise or purported exercise of the power in section 92(9), 92A(9) or 92C(3) above.
Those persons are—
Subsection (1) above does not apply—
This section does not affect any other exemption from liability (whether at common law or otherwise).