As is the case with sub-committees appointed by single authority scrutiny committees, sub-committees of a JOSC can only exercise the functions conferred upon it by the ‘parent’ JOSC.
Yn yr un modd ag is-bwyllgorau a benodir gan bwyllgorau craffu un awdurdod, dim ond y swyddogaethau a roddir iddo gan y ‘rhiant’ gyd-bwyllgor trosolwg a chraffu y gall yr is-bwyllgorau hyn eu harfer.