Parents and teachers who oppose the state policies sued, claiming their parental, free speech and religious rights were violated.

The Supreme Court on Monday barred California from enforcing state rules that restrict when schools can notify parents about students who come out as transgender and requires teachers to use children's preferred pronouns.

The court, on a 6-3 vote on ideological lines, allowed a federal judge’s ruling in favor of parents who oppose the policy on religious grounds to go into effect. The San Francisco-based 9th U.S. Circuit Court of Appeals had put the judge’s decision on hold pending further litigation.

The court's ruling focused on the parents' claim that their rights under the free exercise clause of the Constitution's First Amendment were violated. The court also said they have valid parental rights claims under the Constitution's 14th Amendment.