The Electoral (Amendment) Act 1983 (No. 36) was a law of Ireland which revised Dáil constituencies. It took effect on the dissolution of the 24th Dáil on 21 January 1987 and a general election for the 25th Dáil on the revised constituencies took place on 17 February 1987. It repealed the Electoral (Amendment) Act 1980, which had defined constituencies since the 1981 general election. The membership of Dáil Éireann to be not less than 164 and not more than 168; The constituencies were also in operation for the duration of the 26th Dáil elected at the 1989 general election on 15 June 1989.