"Weapon." For purposes of this Section the term shall include, but not be limited to, any firearm, shotgun, rifle, knife, cutting instrument, cutting tool, nun-chuck stick, and any other tool, instrument or implement capable of inflicting serious bodily injury.
(b) Prohibited Conduct. No person shall knowingly possess a weapon or knowingly cause a weapon to be present, whether openly or concealed, in the buildings of, within one hundred (100) feet of, or in any conveyance providing transportation to or from any elementary or secondary publicly-funded educational institution, any elementary or secondary private school licensed by the Pennsylvania Department of Education or any elementary or secondary parochial school.
(c) Exceptions. The prohibitions set forth in subsection (b) shall not apply to:
(1) The lawful performance of official duties by any full-time officer, agent or employee of the United States, the Commonwealth or a political subdivision who is authorized by law to engage in or supervise the prevention, detection, investigation or prosecution of any violation of law.
(2) The lawful performance of official duties by a school official.
(d) Penalties. The penalty for violation of this Section shall be a fine of not more than three hundred ($300.00) dollars, or imprisonment of not more than ninety (90) days, or both. The fine may be imposed through the confiscation of the illegally possessed weapon by the City of Philadelphia Police Department, said weapon to be melted down or rendered inoperable thereafter.