The attorneys general of Nebraska and Oklahoma aren’t ready to throw in the towel in their bid to overthrow Colorado’s recreational cannabis law, after the duo recently failed to do so before the U.S. Supreme Court.

The two attorneys general have asked to be added as plaintiffs in a separate case aimed at scuttling Colorado’s 2012 voter-approved rec law. That case is now before the 10th Circuit Court of Appeals in Denver.

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According to the Lincoln Journal Star, just making the request means representatives from the two attorneys general’s offices can submit merit-based briefs to the court in support of their argument.

The latest case combines two lawsuits attempting to overturn the Colorado law:

The court has yet to address whether the attorneys general can be added as plaintiffs, and it has not given a timeline for a decision.

In March, the U.S. Supreme Court decided by a 6-2 vote not to take up Nebraska and Oklahoma’s joint lawsuit, which was filed in 2014.