A court in Michigan has ruled in favor of a woman suing Planet Fitness over its transgender-inclusive bathroom and locker room policy.

Yvette Cormier initially filed suit in Midland County in 2015 after her membership was canceled when she objected to seeing a trans woman in the locker room, whom she called "a man."

Staff informed her of the gym's unwritten policy allowing individuals to use the facilities matching their gender identity, and she began warning other women, over the course of several days, that "men" were using the women's facilities.

Midland County Circuit Court Judge Michael J. Beale dismissed the lawsuit in 2016, but Cormier appealed the decision. The Court of Appeals affirmed Beale's ruling, but Cormier appealed to the Michigan Supreme Court, which ordered the lower court to reconsider its decision.

This time, the panel ruled that Cormier's case can move forward because she was not informed of the bathroom and locker room policy. The ruling states Cormier "strongly preferred a locker room and a restroom in which individuals who are assigned biologically male are not present," therefore constituting a misrepresentation of services in the gym's contract.

"Also, a reasonable inference arises from plaintiff’s allegations that defendants’ failure to inform her of the unwritten self identification policy concerning locker rooms and restrooms affected her decision to join the gym," the ruling continues.

It also notes that Cormier "was already a member of the gym when she learned of the unwritten policy and was thus subject to a financial penalty if she canceled her membership earlier than provided in the membership agreement."

The case will now return to a Midland trial court, where Cormier's lawyer will file for a summary disposition, arguing a trial is not needed due to the appeals court's decision.