In the event of new regulations under § 3001 of the Resource Conservation Recovery Act identifying additional characteristics of hazardous wastes or listing any additional substance as a hazardous waste, the user must notify the individuals listed in § 6-1 above, or their authorized representatives, of the discharge of such substance(s) within 90 days of the effective date of such regulation. City Code, 1976/83, art. 25, §7(c)(7) Ord. 91-775