Ar 10 Gorffennaf, diwygiodd Llywodraeth Cymru'r Rheoliadau i gyflwyno eithriadau i’r gofyniad i ynysu ar gyfer rhestr o wledydd a thiriogaethau, ac ystod gyfyngedig o bobl mewn sectorau neu gyflogaeth arbenigol a allai fod wedi'u heithrio rhag y gofyniad i ynysu neu rhag rhai o ddarpariaethau’r gofynion ynghylch gwybodaeth teithwyr.
On 10 July, the Welsh Government amended the Regulations to introduce exemptions from the isolation requirement for a list of countries and territories, and a limited range of people in specialised sectors or employment who may be exempted from the isolation requirement or excepted from certain provisions of the passenger information requirements.