In 1974, the area became part of South Glamorgan, under the Local Government Act 1972. It created several problems in local governance, between the South Glamorgan County Council, Cardiff City Council and the Vale of Glamorgan Borough Council owing to their conflicting interests. It was a turbulent time for governance in the city of Cardiff, as for the first time in its history it had to share authority with the county council, which was larger and better resourced. In April 1996, the Vale of Glamorgan became a county borough (unitary authority) of Wales, after forming part of South Glamorgan county.