Nicola Sturgeon has told SNP rebels that a second referendum is the only legitimate route to Scottish independence.
Backers of a so-called Plan B argue winning a majority of Scottish seats in an election would be enough to begin negotiations with the UK Government for independence.
Prime Minister Boris Johnson has so far ruled out a fresh vote on independence.
Plan B supporters include MP Angus MacNeil and councillor Chris McEleny, who will attempt to have the SNP conference starting in Aberdeen today debate the option.
Inverclyde councillor McEleny said he would submit an amendment to the conference agenda.
He said: “I think Plan B has a lot of support across the grassroots of the party.
“The whole point of a conference is to actually have a debate about policy issues.
“That’s why I joined the party,” he added.
“I know it might inconvenience some people but at the end of the day standing orders exist so that we can hold power to account.”
The first Scottish independence referendum was held in 2014 after a deal was agreed by David Cameron and Alex Salmond.
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