Relating to firearms; and prescribing an effective date.

Authorizes entity that owns, occupies or controls public building to adopt ordinance, rule or policy limiting or precluding affirmative defense for possession of firearms in public buildings by concealed handgun licensees. Provides that ordinance, rule or policy may not affect possession of firearms in parking area or parking garage.] \t\tModifies definition of "public building," for purposes of crime of possession of weapon in public building, to include certain airport areas, buildings owned, occupied or controlled by specified public bodies and real property owned by college or university. Defines "state building" and removes affirmative defense for possession of firearm in state…