(1) As soon as any declaration has been published in accordance with the provisions of section 3, the authorised officer shall, without delay, enter into negotiations (or further negotiations) for the purchase of the land to which the declaration relates upon reasonable terms and conditions, and by voluntary agreement with the owner of the land.
(2) It is not necessary for the authorised officer to await the publication of the declaration before he or she endeavours to ascertain from the owner the terms and conditions on which he or she is willing to sell his or her land, but no negotiations or agreement is considered to be concluded unless and until the conditions of sale and acquisition have been approved in writing by the Governor General.