RICHMOND, Va. — A federal appeals court Tuesday reinstated a lawsuit challenging a 2004 Virginia law requiring parental supervision at a nudist camp for juveniles.

A three-judge panel of the 4th U.S. Circuit Court of Appeals ruled the American Association for Nude Recreation can pursue its claim that the law violates its free speech rights, crimping its ability to spread its nudism philosophy.

The organization claims it had to cancel last summer’s camp because only 11 of the 35 youths who signed up would have been able to bring a parent.

“A regulation that reduces the size of a speaker’s audience can constitute an invasion of a legally protected interest,” Judge William B. Traxler Jr. wrote in the unanimous ruling.