Today this is a level of authority that no Dáil has had since 1941. From 1919 to 1922 "Dáil Éireann" served as the revolutionary, unicameral parliament of the Irish Republic. The First Dáil and the Second Dáil thus existed outside, or in parallel to, of British law. The Third Dáil was elected under the terms of the Anglo-Irish Treaty as a constituent assembly to approve the Free State constitution and pave the way for the creation of the new state. However, once the Constitution of the Irish Free State was in effect the Third Dáil served as the lower house of a new parliament, called the Oireachtas. Under the terms of the constitution, however, the Third Dáil merely carried out the functions of the Dáil during this period until a new chamber could be elected. The first Dáil of the Irish Free State was therefore officially the Fourth Dáil, which was elected in 1923. On 29 December 1937 the Constitution of Ireland came into force and the Irish Free State was succeeded by a state know today as Ireland. The new constitution had been adopted by plebiscite on 1 July of that year, and on the same day the Ninth Dáil was elected. The Ninth Dáil was therefore elected as the lower house of the Free State Oireachtas but in December its role changed to that of lower house of a new legislature.