Mae'r protocol, sy'n cael ei osod ar y cyd gerbon Senedd y DU a Chynulliad Cenedlaethol Cymru, yn paratoi'r ffordd ar gyfer diddymu yr hen bwerau ymyrryd hyn y flwyddyn nesaf.
The protocol, which is being laid jointly before the UK Parliament and National Assembly for Wales, paves the way for the repeal of these outdated intervention powers next year.