# Government of Ireland Act 1920 (repealed 2.12.1999), Section 1: † Establishment of Parliaments of Southern and Northern Ireland.

Extent: E+W+S+N.I.

(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(2) For the purposes of this Act, Northern Ireland shall consist of the parliamentary counties of Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone, and the parliamentary boroughs of Belfast and Londonderry.

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Source: https://www.legislation.gov.uk/ukpga/Geo5/10-11/67/section/1 (the official version)
Page: https://openlegislation.uk/government-of-ireland-act-1920-repealed-2121999/section-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.