Fel y gwyddoch, yn unol â Fframwaith Cyffredin ETS y DU, barn Llywodraeth Cymru am ETS y DU yw mai unig ddiben yr elfennau ariannol yw bod yn fecanwaith ar gyfer gwireddu nod y system – sef diogelu'r amgylchedd trwy roi cymhelliad i ddatgarboneiddio. Gan fod y diwygiad i ostwng y lwfansau arwerthu yn cael ei wneud i'r Rheoliadau Arwerthu, ac nid i ddeddfwriaeth sylfaenol, nid oes angen Cynnig Cydsyniad Deddfwriaethol.  Mae'r diwygiad yn cael ei wneud trwy OS i is-ddeddfwriaeth.  Gan nad yw'r is-ddeddfwriaeth sy'n cael ei diwygio yn brif ddeddfwriaeth uniongyrchol yr UE a ddargedwir o dan baragraff 4 o ran 1 o dan atodlen 8 o Ddeddf yr Undeb Ewropeaidd (Ymadael) 2018, nid y weithdrefn hon yw’r weithdrefn y byddai Senedd Cymru yn ei dilyn pe bai'n diwygio deddfiad a gynhwysir mewn deddfwriaeth sylfaenol.  Felly, nid oes angen Memorandwm Cydsyniad OS, yn unol â Rheolau Sefydlog Senedd Cymru[1].
As you will be aware, in accordance with the UK ETS Common Framework, the Welsh Government's stance on the UK ETS is that the financial elements are simply the mechanism by which the ultimate goal of the system – environmental protection via incentivising decarbonisation – is achieved. As the amendment to lower the auctioning allowances is being made to the Auctioning Regulations, and not primary legislation, a Legislative Consent Motion is not relevant.  The amendment is being made by an SI to subordinate legislation.  As the subordinate legislation being amended is not retained direct principal EU legislation under paragraph 4 of part 1 under schedule 8 of the European Union (Withdrawal) Act 2018, the procedure to be applied before the Senedd is not what would apply to that legislation as if it were amending an enactment contained in primary legislation.  An SI Consent Memorandum is therefore unnecessary, as per the Standing Orders of the Welsh Parliament[1]