the Maine Supreme Court held that a transgender girl had a right to use the women's bathroom at school because her psychological well-being and educational success depended on her transition. The school, in denying her access, had "treated [her] differently from other students solely because of her status as a transgender girl." The court determined that this was a form of discrimination. In Mathis v. Fountain-Fort Carson School District 8 (2013), Colorado's Division of Civil Rights found that denying a transgender girl access to the women's restroom at school was discrimination. They reasoned, "By not permitting the [student] to use the restroom with which she identifies, as non-transgender students are permitted to do, the [school] treated the [student] less favorably than other students seeking the same service." Furthermore, the court rejected the school's defense—that the discriminatory policy was implemented to protect the transgender student from harassment—and observed that transgender students are in fact safest when a school does not single them out as different. Based on this finding, it is no longer acceptable to institute different kinds of bathroom rules for transgender and cisgender people. In May 2016, guidance was issued by the United States Department of Justice and the United States Department of Education stating that schools which receive federal money must treat a student's gender identity as their sex (for example, in regard to bathrooms). However, this policy was revoked in 2017. In October 2016, the Court agreed to take on the case of whether a transgender boy, Gavin Grimm, could use the boys' bathroom in his Virginia high school. Grimm was assigned female at birth but is a transgender male. For a while, he was permitted access to the boys' bathroom but was later denied access after a new policy was adopted by the local school board. The ACLU took on the case, stating that girls objected when he tried to use the girls' bathroom in accordance with the new policy and that he was humiliated when the school directed him to use a private bathroom, unlike other boys. After challenging the policy, he won his case in the Court of Appeals in 2015 in a tie vote. This marked the first ruling by an appeals court to find that transgender students are protected under federal laws that ban sex-based discrimination. However, later in 2016 the U.S. Supreme Court agreed to put that ruling on hold. Then