http://www.legislation.gov.uk/apni/1969/26/section/2Electoral Law Act (Northern Ireland) 1969An Act to extend the local government franchise; to lower the age at which persons may be registered as electors and vote at parliamentary and local govenment elections; to postpone triennial elections; to alter the years in which registers of parliamentary and local electors are published and in which polling station schemes are prepared; and for purposes connected with the matters aforesaid or any of them.texttext/xmlenStatute Law Database2011-05-262006-01-01 21For the purposes of the principal Act, a person shall be of voting age if he is of the age of eighteen or over;... and accordingly the principal Act shall be amended in accordance with the following provisions of this section.Subs.(2) rep. by 1989 c.3Subs.(3) substitutes s.130(4) of 1962 c.14 (NI)Subs.(4) rep. by 1989 c.3Subs.(5) inserts sub‐para.(2A) in sch.7 to 1962 c.14 (NI)1989 c.3