This regulation does not affect higher-risk building work where an initial notice has already been accepted, or deemed to have been accepted before this date.
Nid yw'r rheoliad hwn yn effeithio ar waith adeilad risg uwch os oes hysbysiad cychwynnol eisoes wedi'i dderbyn, neu y bernir ei fod wedi'i dderbyn cyn y dyddiad hwn.