"Explosives" means any chemical compound, mixture or device, the primary or common purpose of which is to function by explosion. The term includes all items contained in the explosives list provided for in 27 CFR § 555.23 and published annually in the Federal Register; PROVIDED That, for the purposes of this title, small arms ammunitions, small arms ammunitions primers, smokeless powder not exceeding 50 pounds, and black powder not exceeding five pounds shall not be defined as explosives. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Amended Ord. 16-013, Mar. 8, 2017, Eff date May 7, 2017).