The B.C. Supreme Court has rejected a last-ditch attempt by a First Nations group on the Sunshine Coast to stop the final vote on an aboriginal treaty that has been almost two decades in the making.

If approved, the treaty, which took 18 years to negotiate with provincial and federal governments, will give members of the Sliammon First Nation, near Powell River, more than 8,300 hectares of land, self government and $30 million in cash.

The Protectors of Sliammon Sovereignty argued in court on Monday that voting abnormalities and flawed voter enrolment should force Judge John Savage to delay the vote, which will now be held on Tuesday as planned.

However, Gregory McDade, lawyer for the Sliammon Treaty Society, told the court the opposition had had ample time to formally protest the process and argued Tuesday's vote should proceed as scheduled.

The court had already put in place an injunction stopping sovereignty group members from blockading the polling station on Tuesday, after they blocked members of the Sliammon First Nation from entering a polling station during the initial treaty vote in June.