The Irish Free State Constitution Act 1922 (Session 2) was an Act of the Parliament of the United Kingdom, passed in 1922 to enact in UK law the Constitution of the Irish Free State, and to ratify the 1921 Anglo-Irish Treaty formally. Provisions As originally enacted, the Irish Free State Constitution Act 1922 consisted of a preamble, five sections (three of which were very brief), and a schedule. The schedule was the text of the Constitution of the Irish Free State (Saorstát Éireann) Act 1922, which had been passed in Ireland by the Third Dáil sitting as a constituent assembly and provisional parliament for the nascent Free State. This Irish Act itself had two schedules, the first being the actual text of the Constitution, and the second the text of the 1921 Treaty (formally, the Articles of Agreement for a treaty between Great Britain and Ireland). The UK Act's preamble quotes section 2 of the Irish Act: Section 1 declared the scheduled Constitution would come into effect upon a royal proclamation no later than 6 December 1922. Section 2 made transitory provisions regarding taxation liabilities Section 3 empowered the Free State parliament to adopt legislation applied to other dominions Section 4 was a saver empowering the UK Parliament to pass laws for the Free State on the same basis as for other dominions Section 5 assigned the short title and specified that the Treaty to have been ratified. Article 12 of the Treaty accorded to Northern Ireland the right to secede from the new Free State and rejoin the United Kingdom, giving its parliament a month in which to decide: the so-called Ulster Month. The Treaty had been implicitly accepted by the UK parliament in votes on the King's Speech in December 1921, and most of its provisions had been effected in March 1922 by the Irish Free State (Agreement) Act 1922. However, neither of these events was held to have formally ratified the treaty. This was because the Ulster Month would begin as soon as the treaty had been ratified, and it was felt that the opt-out should not be exercised until after the Free State had come into being. Section 5 of the Irish Free State Constitution Act therefore declared the Act to be the ratification of the treaty for the purposes of the Ulster Month. Enactment The Irish Act had been approved by the Irish constituent assembly