Implementation has been spread over a four-year period and the final set of measures, relating to storage requirements, will come into force later this year.
Mae’r Rheoliadau wedi bod yn cael eu rhoi ar waith dros gyfnod o bedair blynedd a daw’r set derfynol o fesurau, sy’n ymwneud â gofynion storio, i rym yn ddiweddarach eleni.