The Scottish authorities is to motorboat a ineligible situation to Westminster's artifact connected its arguable sex reforms.
The proposals, which would let radical successful Scotland to self-identify their sex, were passed by the Scottish Parliament successful December past year.
But they were blocked by the UK authorities implicit their imaginable interaction connected UK-wide equality laws.
First Minister Humza Yousaf has antecedently described that determination arsenic an "undemocratic veto".
He was the lone 1 of the 3 candidates successful the SNP enactment contention who backed taking ineligible enactment successful an effort to overturn the block.
Shirley-Anne Somerville, Scotland's societal justness secretary, said the Gender Recognition Reform (Scotland) Bill had been passed by an "overwhelming bulk of the Scottish Parliament, with enactment from members of each parties".
She said the artifact by the UK authorities was an "unprecedented situation to the Scottish Parliament's quality to legislate connected intelligibly devolved matters".
Ms Somerville added: "To uphold the antiauthoritarian determination of the Parliament, and guarantee due extortion of devolution, Scottish Ministers volition present lodge a petition for judicial reappraisal of the Secretary of State's decision."
The sex reforms person been divisive wrong the SNP, with different of the enactment candidates - Ash Regan - resigning from the authorities past twelvemonth implicit her fears astir their interaction connected safeguards for women and girls.
Mr Yousaf has antecedently said helium would lone motorboat a tribunal situation if helium was fixed ineligible proposal that it stood a accidental of succeeding.
But erstwhile Supreme Court justice Lord Hope has said the Scottish government's chances of winning a tribunal lawsuit are "very low".
The erstwhile lawman president of the Supreme Court said the Scottish authorities "most surely does" interaction connected the Equality Act 2010 and the existing Gender Recognition Act 2004, which presently use crossed Great Britain.
And helium said it was hard to spot however a tribunal would not hold that Scottish Secretary Alister Jack had "acted reasonably" successful blocking the reforms done the usage of a Section 35 order, which prevents the authorities receiving royal assent.
He's hardly got his feet nether the array astatine Bute House, but Humza Yousaf has already been pitched into a law showdown with the UK government.
There is an grade to which the caller archetypal curate has been painted into a country here. He lone had until Monday to determine whether to situation the UK government's unprecedented veto of Holyrood's sex reforms.
His SNP enactment run besides promised to support the concern with the Greens - and thing abbreviated of a full-throated defence of the reforms would person seen them walk.
But Mr Yousaf has besides signed up to this combat wholly voluntarily.
He deliberately founded overmuch of his enactment level connected societal justness issues, and said helium would proceed the docket started by Nicola Sturgeon.
And portion crafting his ain individuality arsenic archetypal minister, helium volition not privation to commencement by shying distant from a confrontation with UK ministers connected the taxable of Holyrood's powers.
It is simply a risky strategy fixed however this contented has divided his party. But this is simply a conflict Mr Yousaf is present afloat committed to.