The Council shall provide for an annual independent audit of the accounts and financial transactions of the Merged Government. Such audit shall be made by an accountant or an accounting firm selected by the Council. No such accountant or firm, or member thereof, shall have any personal interest in the fiscal affairs of the Merged Government or any of its departments, agencies, or commissions. The final report of the independent audit shall be filed with the Council as soon as practicable after the close of the fiscal year, and said report shall be made part of the public record of Council proceedings.