Queensland Consolidated Acts9. In a prosecution under this Act it shall be incumbent upon any person charged with refusing or wilfully neglecting to return a form delivered to the person as aforesaid to prove that the person, within the time prescribed by section 4--
(a) delivered such form duly filled up as aforesaid to some person authorised by the government statistician to receive the same; or
(b) deposited or caused to be deposited in some post office such form addressed to the government statistician.