The changes detailed below are applicable for those electors who are considering applying to vote by post or considering appointing someone to vote on their behalf known as a proxy.
Mae'r newidiadau isod yn berthnasol i'r etholwyr hynny sy'n ystyried gwneud cais am bleidleisio drwy'r post neu benodi rhywun i bleidleisio ar eu rhan, a elwir yn ddirprwy.