The Governor-General may arrange with the Governor of New South Wales for the handing over to the Commonwealth of all duplicate grants and certificates of title, and other documents registered or lodged with the registrar-general of that State in respect of land in the ACT, which, at the date of the commencement of this part, is under the Real Property Act 1900
(NSW), or for the delivery to the Commonwealth of copies of those grants, certificates of title and documents duly certified by the registrar-general of the State as correct copies.