240. Existing buildings, structures or works.

Where it appears (1) that subsidence damage1 is likely to occur to any building, structure2 or works3 for the time being on, in or over any land; and (2) that the execution of preventive works on that property (or on that property and some other property which would benefit from those preventive works) would prevent the occurrence or reduce the extent of such damage4, the responsible person5 may:


    (a)     with the consent of all persons who are owners6 of any property7 on which the preventive works would fall to be executed, or who would be liable to make good