Mae'r Rheoliadau sy'n cael eu gwneud heddiw yn cyflwyno system goleuadau traffig tair lefel o sgoriau risg ar gyfer gwledydd a thiriogaethau, ynghyd â gofynion ynysu a phrofi cysylltiedig ar gyfer pobl sydd wedi cyrraedd o'r gwahanol fannau hynny.
The Regulations being made today introduce a three-level traffic-light system of risk ratings for countries and territories and associated isolation and testing requirements for people who have arrived from those different destinations.