Either government can request a review but it is not intended that these arrangements will be reviewed more than once during an Assembly or Parliamentary term.
Gall y naill lywodraeth neu’r llall wneud cais am adolygiad, ond ni fwriedir y bydd y trefniadau hyn yn cael eu hadolygu yn amlach nag unwaith yn ystod tymor Cynulliad neu Seneddol.