Tennessee’s law bans puberty blockers and hormone treatments for transgender minors, but not “across the board,” lawyers for the families wrote in their Supreme Court brief. The lead lawyer, Chase Strangio of the American Civil Liberties Union, is the first openly transgender person to argue in front of the justices.

In the biggest case of the term, the justices considered a challenge to Tennessee’s law banning certain gender transition medical treatments for minors.

The Supreme Court is set to hear the first-ever case on the legality of bans targeting transgender procedures for minors.