While some of the Regulations have been amended since they were made, some have become outdated and do not necessarily reflect current best practice, guidance, and policies.
Mae rhai o’r Rheoliadau wedi’u diwygio ers iddynt gael eu gwneud, ond mae rhai wedi dyddio ac nid ydynt o reidrwydd yn adlewyrchu’r arferion da, y canllawiau a’r polisïau cyfredol.