The director of finance shall have charge of the administration of the financial affairs of the city, including the keeping and supervision of all accounts. The supervision of all accounts as set forth under this section shall include financial records and accounts maintained in connection with all sources of revenue, such as: utilities, all income producing projects and all sources of taxation; the custody and disbursement of city funds and moneys; the preparation and certification of special assessments and the collection of such assessments as are payable directly to the city; the certification of unpaid assessments to the county auditor for collection; the collection of license fees; the control over expenditures; and such other duties as the commission may by ordinance require.