Who is allowed to use tear gas and pepper spray

(a) City police department authorized to use all devices. Notwithstanding the prohibitions prescribed in § 41-12.3 , the chief of police or the chief of police’s subordinates may purchase, possess, discharge, use, or transport shells, cartridges, bombs, guns, or other devices emitting the obnoxious substances enumerated in § 41-12.3 in carrying out their duties. (b) Private security agencies authorized to use certain devices. Notwithstanding the prohibitions prescribed in § 41-12.3 , specifically subsections (a) and (b) thereof, private security officers who are employees of private police or security agencies may purchase, possess, discharge, use, or transport shells, cartridges, bombs, guns, or other devices emitting the obnoxious substances enumerated in § 41-12.3 (a) and (b) in carrying out their duties, subject to the conditions prescribed in § 41-12.6 . (c) Other organizations authorized to use device. Notwithstanding the prohibitions prescribed in § 41-12.3 specifically relating to subsection (c) thereof, employees of government and private organizations who, by necessity of their employment, are required to go on private property to carry out their duties may possess, discharge, use, or transport shells, cartridges, bombs, guns, or other devices emitting the obnoxious substances enumerated in subsection (c) or animal repellents of § 41-12.3 , subject to the conditions prescribed in § 41-12.6 . (d) Pepper sprays. The prohibitions of § 41-12.3 shall not apply to the possession, use, transportation, or other distribution of any pepper spray as defined under § 41-27.1 in the city in a manner permitted under Chapter 41, Article 27 . )