What the words mean in this article

(a) As used in this article, unless the context clearly requires otherwise: (1) “Agency” means organizations, public and private, whose operations are determined by the chief of police to require the use of one or more of the devices enumerated in section 14-9 to accomplish a proper purpose. (2) “Chief of police” means the chief of police of the County or the chief’s authorized subordinate. (3) “Devices” means a shell, cartridge, bomb, gun, or aerosol capable of emitting an obnoxious substance in gas, vapor, liquid, or solid form. (4) “Employee” means all officers, agents, and employees of an agency whether or not such officer, agent, or employee has been issued a permit. (5) “Gun” means revolvers, pistols, rifles, fountain pen guns, riot guns, shot guns, and cannons, portable or fixed, except those regularly manufactured, and used with firearm ammunition. (6) “Obnoxious substance” means a substance enumerated in section 14-8 or its derivative. (7) “Shell, cartridge, or bomb” means a shell, cartridge, or bomb capable of being discharged or exploded by the use of a percussion cap, fuse, electricity, or other means to cause or permit the release or emission of an obnoxious substance.