All legal benefits, salaries or entitlements of the police officers existing on the date of the passage of this amendment shall remain in full force and effect until such time as the terms and provisions thereof are superseded, modified or changed by the terms of a collective bargaining agreement. (Ord. No. 78-152, § 1, 11-7-1978; Ord. No. 89-85, § 1, 11-7-1989)