The justices appeared skeptical of a challenge to the law brought by an adult-content industry group, producers of pornographic material and a porn actress.

A majority of the Supreme Court signaled Wednesday that Texas may be permitted to require some form of age verification for pornographic sites, but left open the possibility that deeper First Amendment questions may not be resolved immediately.

The adult entertainment industry has said the law, which requires sites to verify that users are over 18, violates its free speech rights.