The first review must have been completed by 1 May 2023, with subsequent reviews conducted no later than 5 years from the date of the last review.
Rhaid i'r adolygiad cyntaf fod wedi'i gwblhau erbyn 1 Mai 2023, gydag adolygiadau dilynol wedi'u cynnal ddim hwyrach na 5 mlynedd o ddyddiad yr adolygiad diwethaf.