HARRISBURG, Pa. (AP) — Pennsylvania's highest court is rejecting a law designed to make it easier for organizations like the National Rifle Association to challenge cities' firearms ordinances in court.

The Pennsylvania Supreme Court ruled unanimously Monday to void the law. The justices agreed with a lower court that packaging the measure into a bill on criminal penalties for theft violated a constitutional requirement that bills must be confined to one subject.The lower court threw it out last year, although it had already spawned NRA lawsuits against Philadelphia, Pittsburgh and Lancaster, and scared some municipalities into repealing their firearms ordinances.Under the law, gun owners no longer had to show they were harmed by an ordinance to challenge it. Instead, it let "membership organizations" like the NRA sue on behalf of any Pennsylvania member.