“Criminal street gang” means any ongoing organization, association, or group of 3 or more persons, whether formal or informal:having as one of its primary activities the commission of 1 or more of the criminal acts enumerated in subsection (b); having a common name or common identifying sign or symbol; and comprised of members who individually or collectively engage in or have engaged in a pattern of criminal gang activity. “Pattern of criminal gang activity” means the commission or attempted commission of, or solicitation for, 2 or more of the following offenses within a period of 3 years, provided that the more recent commission or solicitation occurred after July 29, 1995:assault with intent to murder, ravish, or rob; robbery; murder or manslaughter; the sale, possession for sale, transportation, manufacture, offer for sale, or offer to manufacture controlled dangerous substances; unlawful wearing, carrying, or transporting a handgun; or arson. City Code, 1976/83, art. 19, §250 Ord. 95-586