The EWC must investigate when it is alleged a registered person is guilty of unacceptable professional conduct, serious professional incompetence or has been convicted of a relevant offence.
Mae'n rhaid i Gyngor y Gweithlu Addysg gynnal ymchwiliad os honnir bod person cofrestredig yn euog o ymddygiad proffesiynol annerbyniol, anghymhwysedd proffesiynol difrifol, neu drosedd berthnasol.