Electoral (Amendment) Act 1974

[1] It was a review of parliamentary constituencies passed in Ireland by the governing Fine Gael–Labour Party National Coalition.

It was intended to secure their re-election, but instead backfired disastrously resulting in a landslide victory for their main opponents in Fianna Fáil.

By radically redrawing the boundaries in the Greater Dublin Area, creating a large number of three member constituencies rather than 4 or 5 member constituencies, it was hoped to capitalise on the relative weakness of the main opposition party Fianna Fáil in the capital.

This plan however relied on the Fianna Fáil vote remaining below the 40% mark in the Dublin area.

In the event of it passing that figure, the danger was that Fianna Fáil could win two seats in each constituency even though other parties would have had a combined 60% of the vote.