Statutory guidance: this kind of guidance is set out in law as to who provides it, what issues it must contain, and who must follow it.
Rhaid i’r cyfansoddiad nodi’n glir sut y gwneir penderfyniadau, pwy sy’n eu gwneud, pa benderfyniadau sy’n cael eu dirprwyo ac i bwy, a sut y mae’r penderfyniad i ddirprwyo yn cael ei wneud.