"Gallai unrhyw newid i'r rheolau tollau sy'n ychwanegu at gostau, amser, anghyfleustra a rheoliadau gael effaith ar economi Cymru. Mae 80% o'r nwyddau a gludir rhwng Iwerddon ac Ewrop mewn lorïau sydd wedi'u cofrestru yn y Weriniaeth yn pasio trwy borthladdoedd Cymru. Rhaid i Lywodraeth y DU fod yn agored ynghylch ei chynlluniau i gadw 'ffin feddal' rhwng Gweriniaeth Iwerddon a Gogledd Iwerddon. Ni fydd Llywodraeth Cymru'n barod i dderbyn unrhyw ganlyniad allai ddenu traffig i ran arall o'r DU ar draul porthladdoedd Caergybi, Abergwaun a Doc Penfro."
“Any changes to customs rules which add to costs, time, inconvenience and regulation could have an impact on the economy of Wales. 80% of goods carried in Irish registered HGVs between the Republic and Europe pass through Welsh ports. The UK Government must be transparent on how it plans to maintain a frictionless 'soft border' between the Republic of Ireland and Northern Ireland. The Welsh Government will not accept any outcome which has the potential to stimulate traffic away from the ports of Holyhead, Fishguard and Pembroke Dock in favour of another part of the UK.”