A partial repeal occurs when a specified part or of a previous act is repealed but other provisions remain in force. For example, the Acts of Union 1800, providing for the union between the formerly separate kingdoms of Great Britain and Ireland as the United Kingdom, was partially repealed in 1922. This was when (as a consequence of the 1921 Anglo-Irish Treaty), twenty-six of the thirty-two counties of Ireland were constituted as the Irish Free State, and ceased to be part of the United Kingdom.