Option 4 realises some of the benefits delivered by options 2 and 3 in terms of standardising matters such as appointment of tribunal members and enhancing judicial independence.
Mae opsiwn 4 yn gwireddu rhai o fanteision opsiynau 2 a 3 o ran safoni materion fel penodi aelodau tribiwnlysoedd a gwella annibyniaeth farnwrol.