It follows a delay in the UK Government's response to the Silk Commission which last year recommended the transfer. A Welsh Conservative spokesman had this to say:
Our public commitment to the full implementation of Silk One remains unswerving. Perhaps Mike Hedges’ short memory has also forgotten his running Swansea Council into the ground. It is Labour’s squandering of public money that Silk’s recommendations – when introduced - will properly hold to account.
Earlier this month the Prime Minister refused to commit to a new date saying that a consultation on one of the taxes involved, Stamp Duty Land Tax, needs to finish. That's being echoed by the Welsh Secretary who described today's JMC meeting as 'positive and productive,' before adding:
I fully understand how important the Silk Commission's report is. The Commission's recommendations raise issues of crucial importance to Wales and to theUnited Kingdom as a whole. As a Government, we are determined to make the right response to those recommendations. We listened to industry concerns about the proposed devolution of Stamp Duty Land Tax (SDLT) by consulting further. We are considering the further representations that have been made, and are finalising our response to the Commission's recommendations.
The Silk Commission is currently examining the powers of the National Assembly, and the boundary of the Welsh devolution settlement, under Part II of its remit. It is due to report its Part II findings in the spring of next year, and we will consider the Commission's Part II recommendations carefully when published.
The First Minister has led the way on calling for a Constitutional Convention. He has raised the issue many times in face-to-face discussions with both the Prime Minister and Deputy Prime Minister. As usual, Plaid Cymru are late to the table and have nothing useful to add to this debate.
The First Minister says David Cameron now knows how strongly the Welsh business community backs the transfer of tax and borrowing powers. Carwyn Jones also said that the Prime Minister reaffirmed the UK Government's agreement to fund fully rail electrification to Swansea and the Valley Lines.
Before the meeting of the Joint Ministerial Committee, Carwyn Jones said he was looking for an explanation for the delay in a decision on tax and borrowing powers as recommended in the Silk Commission. Our Political Editor Adrian Masters asked him if he got his answer.
But Hywel Williams asked the UK Government department responsible, the Deputy Prime Minister's office, what approaches the First Minister has made. This was the answer from Minister Greg Clark:
The Deputy Prime Minister has not received any recent representations on the topic of a constitutional convention from the Welsh Government.
On the day that Carwyn Jones intends to push the Prime Minister over the delayed decision on tax and borrowing powers for Wales, Mr Williams says that it raises questions about the First Minister's own commitment.
For all the First Minister's bluster, it seems that he's making no real progress on this.
It's becoming increasingly difficult to take him seriously when he claims to be committed to securing a better settlement for Wales. The only thing he has achieved is undermining people's confidence in his abilities.
In January last year, the First Minister called for this Convention to be set up to keep the UK together. After nearly two years of stagnation, we can now only presume that he is in favour of Scottish independence.
The First Minister, Carwyn Jones, is expected to tackle David Cameron over a delayed decision on transferring control of some taxes and borrowing powers to the Welsh Government. They'll meet in Downing Street where the Prime Minister will host a session of the Joint Ministerial Committee.
The JMC is a chance for the First Ministers and Deputy First Ministers from Wales, Scotland and Northern Ireland to air any grievances with the UK Government. It's usually chaired by the Deputy Prime Minister but once a year the Prime Minister takes charge.