Mae rhan 5 o Ddeddf Llywodraeth Leol ac Etholiadau (Cymru) 2021 yn galluogi sefydlu Cyd-bwyllgorau Corfforedig, drwy reoliadau. Gellir cyflawni hyn drwy ddau lwybr : ar gais dau neu fwy o brif gynghorau; ac ar gais Gweinidogion Cymru, ond dim ond yng nghyd-destun swyddogaethau penodol neu feysydd swyddogaethol sydd wedi eu nodi ar wyneb y Ddeddf.
Part 5 of the Local Government and Elections (Wales) Act 2021 provides for the establishment, through regulations, of Corporate Joint Committees. This can be achieved by two routes: at the instigation of two or more principal councils; and at the instigation of Welsh Ministers, but only in relation to certain functions or functional areas which are specified on the face of the Act.