A local authority may include in a housing action area any land belonging to them which they might have included in such an area if the land had not belonged to them.

Where any land belonging to a local authority is included in a housing action area, or where any land belonging to a local authority is surrounded by or adjoins a housing action area and might have been purchased by the authority under paragraph 4 had it not been previously acquired by them, the provisions of Part IV and this Schedule shall apply in relation to any such land as if it had been purchased compulsorily by the authority as being land comprised in the housing action area or, as the case may be, as being land surrounded by or adjoining the housing action area.