The Minister may, for the purpose of obtaining land for reservation under Part 4 or Part 4A, of conserving threatened species, populations or ecological communities, or their habitats or of preserving, protecting and preventing damage to Aboriginal objects or Aboriginal places--
(a) on behalf of Her Majesty, enter into and give effect to an agreement for the vesting in, or surrender to, Her Majesty of any land, or
(b) acquire land by agreement or by compulsory process in accordance with the Land Acquisition (Just Terms Compensation) Act 1991 .