Daw'r rheoliadau angenrheidiol i rym am 04:00 ddydd Mawrth 12 Ionawr 2021, a byddant yn cael eu gosod yfory unwaith y byddant wedi'u cofrestru.
The necessary regulations will come into force at 04:00 on Tuesday 12 January 2021, and they will be laid tomorrow once they have been registered.