The meeting will attempt to reach agreement despite the failure of previous talks and despite both Welsh and Scottish governments launching audacious bids to claim the disputed powers for themselves.
Ms Davidson stated: "As things stand, the Scottish Government has no influence over these European Union powers and never has, because they are held in Brussels".
The Conservative claimed the dispute between Edinburgh and London on this issue "now boils down to a disagreement" over what should happen to a small number of powers in the period immediately after the United Kingdom quits the European Union.
He said: "The vast majority of powers will be in the control of the devolved administrations on the day we leave the EU".
Loganair takes the plunge in the Lake District
Dublin will also have a daily service each day of the week and Belfast City will be served daily, excluding Saturday. The Scottish airline will run flights to the south of England, Northern Ireland and Republic of Ireland from 4 June.
Scotland's Brexit minister Michael Russell said there remained a "very substantial power grab" being proposed by Whitehall.
Ahead of more talks between the United Kingdom and Scottish governments on the issue, and with Theresa May and Nicola Sturgeon due to meet next week, Ms Davidson branded the proposed legislation a "massive political power play from this SNP government".
That means Welsh ministers will recommend that AMs refuse to give it consent as it applies to Wales and they'll push ahead with their continuity bill which is being sped through the Assembly after AMs voted this week to treat it as emergency legislation.
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But Lidington, who chaired the JMC meeting, said he was putting forward a "significant proposal" to address concerns on the controversial clause 11 of the European Union (Withdrawal) Bill now going through Parliament. After all there's another get-together planned for next week which will see Theresa May meet Carwyn Jones and Nicola Sturgeon.
Welsh Government finance minister Mark Drakeford said he hoped the amendment would be the basis for further talks rather than Whitehall's "final word".
Those moves, contained in "continuity bills", followed a decision by the two devolved governments to reject a compromise by the UK Government over its EU Withdrawal Bill. Download it today and continue to enjoy STV News wherever you are.
DGCA grounds A320 Neo planes with Pratt & Whitney engines
After this, three A-320s of IndiGo were grounded in India as these planes had both engines of the flagged type. DGCA said it had also asked the airlines not to replace the engines.