Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) In proceedings arising out of this Part:
(a) a certificate in writing given by an authorized person certifying as to any matter relevant to establishing that particular premises are, or were at a particular time, Commonwealth premises is prima facie evidence of the matter so certified; and
(b) a writing purporting to be such a certificate shall, unless the contrary is proved, be deemed to be such a certificate and to have been duly given.
(2) In this section, authorized person means a person in respect of whom there is in force for the time being a delegation of any power under section 139 of the Lands Acquisition Act 1989 .