A Philadelphia ordinance requiring residents to report to authorities when firearms are lost or stolen has been ruled illegal by a Pennsylvania court.

A three-judge panel on Monday reversed a lower court order and placed a permanent injunction on the city’s 2009 gun control ordinance, preventing the city from enforcing the measure. The case stems from a man charged with violating the “lost and stolen” reporting mandate, and Philadelphia authorities had sought a $2,000 fine for violating the ordinance.