The U.S. Supreme Court punted on the question of whether district courts can independently interpret the federal robocall law or must defer to the Federal Communications Commission’s reading.

The extent to which a court is bound by the FCC’s interpretation depends on the legal nature of the agency’s order and whether a defendant had a chance to seek judicial review of the order, the justices ruled.

The high court reversed and remanded a decision by the U.S. Court of Appeals for the Fourth Circuit reviving a junk-fax lawsuit against health-care information company PDR Network LLC. An appeals panel said the...