Provisional Government of Ireland (1922)

The Provisional Government of Ireland (Irish: Rialtas Sealadach na hÉireann) was the provisional government for the administration of Southern Ireland from 16 January 1922 to 5 December 1922. It was a transitional administration for the period between the ratifying of the Anglo-Irish Treaty and the establishment of the Irish Free State. Its legitimacy was disputed by the Anti-Treaty delegates to Dáil Éireann.

Article 17 of the Anglo-Irish Treaty begins:

On 14 January 1922 a meeting of the members elected to the House of Commons of Southern Ireland was held at the Mansion House, Dublin. At the meeting the Anglo-Irish Treaty was ratified by the Irish side in accordance with the Treaty and a Provisional Government was elected for the purposes of Article 17 of the Treaty. Michael Collins was appointed its Chairman. The Provisional Government took up office two days later on 16 January 1922 when British administration handed over Dublin Castle to Collins in person. At this time, Westminster had not formally appointed the new Irish ministers or conferred their government with any powers.

These gaps were addressed through the Irish Free State (Agreement) Act 1922 of the British Parliament passed on 31 March 1922. It gave the force of law to the Anglo-Irish Treaty, which was scheduled to the Act. Section 1(2) of the Act provided that for the purposes of giving effect to Article 17 of the Treaty:

The Act did not give a name to that Parliament but said that in matters within the jurisdiction of the Provisional Government (i.e. only certain matters concerning Southern Ireland), it would have power to make laws in like manner as the Parliament of the Irish Free State when constituted.

...
Wikipedia