This section applies where—
has not been taken within the period specified in the order or within such extended period as the local planning authority or, as the case may be, the mineral planning authority may allow.
Where this section applies the local planning authority or, as the case may be, the mineral planning authority may enter the land and take the required step.
Where the local planning authority or, as the case may be, the mineral planning authority have exercised their power under subsection (2) they may recover from the person who is then the owner of the land any expenses reasonably incurred by them in doing so.
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Section 276 of the Public Health Act 1936 shall apply in relation to any works executed by an authority under subsection (2) as it applies in relation to works executed by a local authority under that Act.