Regulation 1(2)
| Administering authority | New principal council |
|---|---|
| Clwyd County Council | Flintshire County Council |
| Dyfed County Council | Carmarthenshire County Council |
| Gwent County Council | Torfaen County Borough Council |
| Gwynedd County Council | Caernarfonshire and Merionethshire County Council |
| Mid Glamorgan County Council | Rhondda, Cynon, Taff County Borough Council |
| Powys County Council | Powys County Council |
| South Glamorgan County Council | Cardiff County Council |
| West Glamorgan County Council | Swansea County Council |