A Michigan group seeking to put a marijuana legalization question on the November ballot is taking its fight to court.

MI Legalize on Thursday filed a lawsuit against the state in the Michigan Court of Claims, challenging a law and policy that effectively invalidated its petition signatures collected outside of a customary 180-day window.

Attorneys Jeff Hank, Thomas Lavigne and Matthew Abel, members of the MI Legalize board, argue the law and policy are inconsistent with the Michigan Constitution, which allows for initiated petitions but does not specify a time limit for signature collection.

The six-count complaint also contends rejecting older signatures denies voters their free speech and political expression rights under the First Amendment to the U.S. Constitution.

“We’re just asking for our petitions to be treated like all the others so that anyone who signed as a registered voter has their voice heard,” Hank told The Detroit News. “The state doesn’t really have an argument for why they wouldn’t count someone’s signature if it’s legitimate.” [Read more at The Detroit News]