SNP members are to beryllium fixed the prime of utilizing the adjacent UK wide predetermination oregon the adjacent Holyrood predetermination arsenic a de facto independency referendum.
The enactment says its archetypal prime is inactive for the UK authorities to hold to a referendum.
But if that is not imaginable it could usage the wide predetermination arsenic a vote.
The 2nd enactment would beryllium to dainty the UK predetermination effect arsenic a mandate for the enactment to contention the 2026 Holyrood predetermination arsenic an independency vote.
The UK authorities said present was a clip to absorption connected "shared challenges" specified arsenic the outgo of surviving crisis.
The SNP's nationalist enforcement committee met connected Saturday to hold the motion.
It volition present beryllium enactment to members astatine a peculiar enactment league successful March.
Leader Nicola Sturgeon said the 2nd enactment had been included successful the question successful the interests of having a "full and unfastened debate".
She said: "Given the value of this determination for some the enactment and the country, it is important that this statement is simply a full, escaped and unfastened 1 - which is what the draught solution seeks to enable.
"It sets retired - arsenic I did past June - the enactment of contesting the adjacent Westminster predetermination arsenic a de facto referendum.
"However, successful the interests of a afloat and unfastened debate, it besides sets retired the alternate enactment of contesting the adjacent Scottish Parliament predetermination connected this basis."
She added: "While this volition beryllium a statement connected the process of securing independence, it is 1 that volition beryllium guided by a cardinal rule - that the aboriginal of Scotland indispensable and volition beryllium decided by the radical of Scotland, not by Westminster politicians."
In November, the archetypal curate announced the SNP intended to usage the adjacent wide predetermination arsenic an effort to amusement that a bulk of radical successful Scotland supported independence.
She spoke aft the Supreme Court unanimously ruled she did not person the powerfulness to clasp a referendum this year.
Ms Sturgeon said she respected the ruling but admitted it was a "tough pill to swallow".
She besides said the independency question would present person to find a caller mode forward.
Prime Minister Rishi Sunak had welcomed the "clear and definitive ruling" from the Supreme Court.
On Saturday, a UK authorities spokeswoman said: "People successful Scotland privation some their governments to beryllium concentrating connected the issues that substance astir to them - similar increasing our economy, getting radical the assistance they request with their vigor bills, and supporting our NHS.
"As the premier curate has been clear, we volition proceed to enactment constructively with the Scottish authorities to tackle our shared challenges."
When Nicola Sturgeon archetypal raised the anticipation of utilizing an predetermination arsenic a substitute referendum past June, she intelligibly targeted the adjacent UK wide election.
When she returned to the thought successful her SNP league code successful October, she talked astir utilizing "an" predetermination without specifying which one.
When I pointed this retired connected societal media and raised the imaginable flexibility successful her wording, a elder SNP root told maine I was "over interpreting". Maybe not.
While the SNP inactive picture utilizing the adjacent Westminster ballot to trial sentiment connected independency arsenic the "principal" alternate to the referendum they truly want, enactment members are to beryllium fixed a choice.
They tin either opt for Westminster successful (presumably) 2024 oregon for the Holyrood predetermination planned for 2026 oregon adjacent suggest further possibilities of their own.
The SNP accidental utilizing either predetermination to justice enactment for independency would beryllium "credible and deliverable" but their opponents garbage to judge this is simply a morganatic way to Scottish statehood.