Under the terms of the Act, it was then repealed by a Statutory Instrument to be approved by Parliament. The Scottish National Party subsequently voted against the government in a vote of no confidence which led to the resignation of the Callaghan government, and an election was called. The vote to approve the statutory instrument repealing the Act was not held until 20 June 1979, by which time a Conservative government had come to power under Margaret Thatcher. The Order-in-Council was subsequently made on 26 July 1979.