From an NRA press release:

_The National Rifle Association (NRA) and other plaintiffs have filed a lawsuit in the Court of Common Pleas of Allegheny County, Pennsylvania, seeking to enjoin the City of Pittsburgh from enforcing a December 2008 ordinance that requires gun owners to report a lost or stolen firearm to police within 24 hours.

“Time and again we see local governments infringing upon the rights of law-abiding gun owners while ignoring the true source of crime – criminals,” said Chris W. Cox, NRA chief lobbyist. “The members of the Pittsburgh City Council and the Mayor enacted this ordinance with full awareness that their actions violate the laws of their own Commonwealth and the Pennsylvania Constitution.”