Any sworn law-enforcement officer who has the duty and obligation to enforce the penal or traffic laws of the Commonwealth of Virginia, or any portion thereof, as certified by his appointing authority and including, but not limited to, any person appointed pursuant to §§ 4.1-100, 9.1-101, 15.2-1609, 15.2-1700, 23.1-809, 29.1-200, 30-34.2:1, 52-1, 53.1-1, 53.1-143, and 66-25.3 of the Code of Virginia; any attorney for the Commonwealth as provided in § 18.2-308 B 9 of the Code of Virginia; any conservator of the peace exempt from § 18.2-308 A of the Code of Virginia pursuant to § 18.2-308 C 4 of the Code of Virginia; and any sworn federal law-enforcement officer or agent and any law-enforcement agent of the armed forces of the United States who is authorized to carry a weapon by federal law and who is within his territorial jurisdiction or who is contracted with the university to provide services within the university's territorial jurisdiction and who is on duty or providing services to the university.