Where the age of any person is required to be ascertained or proved for the purposes of this Act any person shall on presenting a written requisition in such form and containing such particulars as may be from time to time prescribed by the Minister of Health and on payment of a fee of sixpence, be entitled to obtain a certified extract under the hand of a registrar or superintendent registrar of the entry in the register under the Births and Deaths Registration Acts, 1836 to 1929, of the birth of that person; and such form of requisition shall on request be supplied without charge by every superintendent registrar and registrar of births, deaths and marriages.