Where a local housing authority have declared an area to be a housing action area, they may, for the purpose of securing or assisting in securing all or any of the objectives specified in section 239(2)(a) to (c) exercise the following powers.
They may acquire by agreement, or be authorised by the Secretary of State to acquire compulsorily, land in the area on which there are premises consisting of or including housing accommodation.
They may undertake on land so acquired all or any of the following activities—
If after—
the housing action area concerned ceases to be such an area or the land is excluded from the area, the provisions of that subsection continue to apply as if the land continued to be in a housing action area.