Without prejudice to the rights and powers conferred by the other provisions of this Chapter, any person designated in writing under this section by the Agency or by the NRBW may enter any premises for any of the purposes specified in subsection (2) below.
The purposes mentioned in subsection (1) above are the carrying out of any survey or tests for the purpose of determining—
The power by virtue of subsection (1) above of a person designated under this section to enter any premises for the purpose of carrying out any survey or tests shall include power—
The powers conferred by this section or section 172 of the Housing and Planning Act 2016 shall not be exercised on behalf of the Agency or the NRBW in any case for purposes connected with the determination of—
unless the Secretary of State has, in accordance with subsection (5) below, given his written authorisation in relation to that case for the exercise of those powers for those purposes.
The Secretary of State shall not give his authorisation for the purposes of subsection (4) above unless—
In relation to the NRBW, the reference to functions in subsection (2)(a) has effect as a reference to relevant transferred functions.