The United States Supreme Court has blocked a California policy that protected students from being forcibly outed to their parents if they come out as queer or trans at school.

And it’s the latest case to tackle parental rights and religion in the U.S. that could have sweeping repercussions for the rights of queer and trans kids across the country.

The court challenge was brought to the Supreme Court as an emergency appeal by a group of teachers and parents represented by a Catholic public interest law firm. They argued that California’s policy violated their religious freedom to raise their kids in accordance with their religion.

On the other side, the state argued that this policy protects queer and trans kids from unsafe homes or abusive parents. Outing kids to their parents could threaten “significant psychological, emotional and sometimes even physical harm,” the state told the court.

But the conservative-majority court ultimately sided with the parents. We break down what you need to know.