Nid oes gwahaniaeth rhwng Llywodraeth Cymru a Llywodraeth y DU o ran y polisi ar gyfer y cywiriad. Felly, byddai gwneud trefniadau ar wahân yn arwain at ddyblygu gwaith, a chymhlethdod diangen. Nid yw'r OS yn effeithio ar y setliad datganoli nac yn lleihau pwerau Gweinidogion Cymru, gan nad yw'n rhoi pwerau newydd i'r Ysgrifennydd Gwladol mewn perthynas â Chymru.
There is no divergence between the Welsh Government and the UK Government on the policy for the correction. Therefore, making separate arrangements would lead to duplication and unnecessary complication. The SI has no impact on the devolution settlement and causes no diminishment of the Welsh Ministers’ powers, as it grants no new powers to the Secretary of State in relation to Wales.