Ac, wrth gwrs, mae cyfres o reolau newydd, sy'n berthnasol ledled Cymru – i bawb sy'n byw yng Nghymru – sy'n berthnasol i safleoedd trwyddedig, cyfarfod o dan do a gwisgo gorchuddion wyneb.
And, of course, there are series of new rules, which apply across Wales – to everyone living in Wales – which apply to licensed premises, meeting indoors and wearing face coverings.