Sec. 13. Annual audit.
   As soon as practicable after the close of each fiscal year, an independent audit shall be made of all accounts of the city government and corporations established by the city. The certified public accountants, appointed by the commission, shall have no personal interest, directly or indirectly, in the financial affairs of the city or any of its officers. The scope of the audit shall require a limited review of city-owned property and the results shall be reported with each annual audited financial report. Upon completion of the annual audit, the combined balance sheet thereof shall be published in the official newspaper of the city within thirty (30) days of commission acceptance of such audit. Copies of all audits shall be placed on file with the city’s public library, the director of finance and the city secretary.