(1) it's a violation of this statute for anyone to intentionally possess a loaded or unloaded firearm or any other instrument used as a dangerous weapon, while in or on a public building

(2)(a) except as provided in (b) below, it's a violation of this statute for anyone to intentionally possess:

(A) a firearm in a court facility. Anyone who intentionally possesses a firearm in a court facility shall surrender the firearm to a law enforcement officer.

(B) a weapon, other than a firearm, and fails to surrender the weapon to a law enforcement officer or to immediately remove it from the court facility if required to do so.

(C) a firearm in a local court facility if prior to the offense the presiding judge of the local court facility entered an order prohibiting firearms in the area in which the court conducts business and during the hours in which the court operates

(b) the presiding judge of a judicial district or a municipal court may enter an order permitting the possession of specified weapons in a court facility

(c) within a shared court facility, the presiding judge of a municipal court or justice of the peace district may not enter an order concerning the possession of weapons in the court facility that is in conflict with an order entered by the presiding judge of the circuit court

(3) (1) above doesn't apply to:

(a) a police officer or reserve officer

(b) a parole and probation officer

(c) a federal officer, a certified reserve officer or corrections officer while acting within the scope of employment

(d) someone summoned by an officer, described in (a), (b) or (c) above, to assist in making an arrest or preserving the peace, while the summoned person is engaged in assisting the officer

(e) an honorably retired law enforcement officer

(f) an active or reserve member of the military forces of this state or the United States, when engaged in the performance of duty

(g) someone licensed under 166.291 (issuance of concealed handgun license) and 166.292 (procedure for issuing) to carry a concealed handgun

(h) someone authorized by the officer or agency that controls the public building to possess a firearm or dangerous weapon in that public building

(i) an employee of the United States Department of Agriculture, acting within the scope of employment, who possesses a firearm in the course of the lawful taking of wildlife

(j) possession of a firearm on school property if the firearm:

(A) is possessed by someone who is not otherwise prohibited from possessing the firearm AND

(B) is unloaded and locked in a motor vehicle

(4)(a) the exceptions listed in (3)(d) to (j) above constitute affirmative defenses to a charge of violating subsection (1) of this statute

(b) a person may not use the affirmative defense described in (3)(e) if they have been convicted of an offense that would make them ineligible to obtain a concealed handgun license under 166.291 (issuance of concealed handgun license) & 166.292 (procedure for issuing)

(5)(a) it's a violation of this statute for anyone to knowingly, or with reckless disregard for the safety of another, discharge or attempt to discharge a firearm at a place that they know is a school

(b) paragraph (a) above doesn't apply to the discharge of a firearm:

(A) as part of a program approved by a school in the school by an individual who is participating in the program

(B) by a law enforcement officer acting in the officer's official capacity OR

(C) by an employee of the United States Department of Agriculture, acting within the scope of employment, in the course of the lawful taking of wildlife