In recent years, a number of state legislatures considered bills that would restrict access to multiuser restrooms, locker rooms, and other sex-segregated facilities (bathroom bills) on the basis of a definition of sex or gender consistent with sex assigned at birth—also known as biological sex. In nearly every state the proposed legislation was not passed and did not become law.

A recent ruling from the United States Court of Appeals for the Third Circuit (in Philadelphia) allowed transgender students to use bathrooms and locker rooms that are consistent with the students' gender identities, as opposed to the sex they were determined to have at birth. The plaintiffs—a group of high school students who identify as being the same sex they were determined to have at birth (cisgender)—alleged that the school’s bathroom and locker room policy violated their constitutional rights of bodily privacy, as well as Title IX, and Pennsylvania tort law.

The Third Circuit Court of Appeals determined that the presence of transgender students in the locker and restrooms is no more offensive to Constitutional or Pennsylvania privacy law interests than the presence of the other students who are not transgender, and that their presence does not infringe on the plaintiffs' rights under Title IX. This ruling from the Third Circuit Court of Appeals is the law in a limited geographic area, as the United States Supreme Court declined to hear the case.

In Idaho, as of the current knowledge cutoff in 2023, there has been no successful passage of 'bathroom bills' that would restrict access to multiuser restrooms and other sex-segregated facilities based on biological sex at birth. While some states have considered such legislation, Idaho has not enacted a law that mandates the use of restrooms by transgender individuals according to their sex assigned at birth. The ruling from the United States Court of Appeals for the Third Circuit, which upheld the rights of transgender students to use facilities consistent with their gender identity, does not directly impact Idaho law as it is outside the jurisdiction of the Third Circuit. The Supreme Court's decision not to hear the case leaves the Third Circuit's ruling in place, but it does not set a nationwide precedent. Therefore, in Idaho, there is no specific state statute or federal law stemming from this case that governs the use of sex-segregated facilities by transgender individuals. It's important for individuals in Idaho to consult with an attorney for the most current and applicable legal guidance regarding the use of such facilities.