Each collector shall at all times maintain, at its own expense, workers’ compensation insurance coverage for all employees in the amounts required by law. Each collector shall file and maintain certificates with the manager showing the insurance to be in full force and effect at all times the collector is authorized by the city to provide services within the city. (Ord. 716 § 2, 2021; Ord. 532 § 1. 2002 Code § 12-7.12).