Each authority shall: Keep a complete record of its receipts and expenditures; Employ a certified public accountant to audit its books and accounts; Keep a detailed audit and financial statement of its accounts available and open for public inspection at its principal office during business hours; and File annually a certified copy of the detailed audit and financial statement with the governing body of each member political subdivision. In person or by authorized agents, the governing body of any member political subdivision may examine and audit the books and records of the authority. An examination or audit under this subsection is without cost to the authority.