A co-ordinated scheme may be imposed by Welsh Ministers where a local authority has not notified the Welsh Ministers by 28 February each determination year whether or not a scheme has been adopted.
Gall Gweinidogion Cymru osod cynllun cydlynol pan nad yw awdurdod lleol wedi hysbysu Gweinidogion Cymru erbyn 28 Chwefror bob blwyddyn benderfynu a yw cynllun wedi'i fabwysiadu ai peidio.