If:
(a) an area of land is outside the airport site for Sydney West Airport; and
(b) the Commonwealth has:
(i) the right to carry out; or
(ii) the right to allow another person to carry out;
on the area of land, a development that may reasonably be regarded as ancillary or incidental to Sydney West Airport; and
(c) the right:
(i) is a result of the Commonwealth holding an estate or interest in the area of land; or
(ii) arises under a contract;
then:
(d) for the purposes of this Act, the area of land is an associated site for Sydney West Airport ; and
(e) for the purposes of the application of this Act to the associated site, the development is an ancillary development .