It is presumed, unless the contrary is proved, that a document was attested or verified by, or signed or acknowledged before, a justice of the peace, Australian lawyer or notary public, if –

(a) an Australian law requires, authorises or permits it to be attested, verified, signed or acknowledged by a justice of the peace, an Australian lawyer or a notary public; and

(b) it purports to have been so attested, verified, signed or acknowledged.