True Wales, the group that campaigned for a "no" vote in the 2011 referendum that gave fuller law making powers to the Assembly, says it's "appalled" by the Silk Commission's recommendations.
The devolution of Income tax came a step nearer today, as Welsh Secretary David Jones MP published a draft Wales bill which allows the Welsh Government to control the tax - subject to a referendum.
It was also announced that assembly candidates will be able to stand in constituencies and for regional seats, along with confirmation of borrowing powers for the Welsh Government.
Our political reporter Owain Phillips is in Westminster and sent this report.
The First Minister has said again that he's opposed to the transfer of income tax powers unless the way Wales is funded is first sorted out. Carwyn Jones told me it would be used as 'an excuse' by the Treasury not to reform the way funding is worked out, known as the Barnett formula.
At his monthly press conference, he'd cited the 2011 referendum on lawmaking powers as one of the main achievements of his four years in post despite opposition from within his own party. I asked him if that made him more likely to back an income tax referendum.
His answer is an unequivocal 'no' as you can see in the clip to below. Watch to the end of the clip for his final comment casting doubt on the motives of Conservative and Liberal Democrat politicians who are pushing for an early referendum.
It's not the most controversial motion ever to be debated in the Senedd but that's not why Plaid Cymru have tabled it. It's more a salute to the man who has led them since 2000. The Assembly is being asked to agree that it:
The idea is to provide a platform for Ieuan Wyn Jones to give his final speech as party leader and if opposition politicians are so inclined to join Plaid Cymru AMs in singing his praises.