When the Republic of Ireland Act 1948 came into force on 18 April 1949, the new republic ceased to be a member of the Commonwealth, and the role of the monarch in the Irish state was abolished on the same date.
The new republic ceased to be a member of the Commonwealth. The Republic of Ireland Act 1948 came into force on 18 April 1949. The role of the monarch in the Irish state was abolished on the same date.