At the close of each fiscal year, and at such other times as it may be deemed necessary, the City Council shall cause an independent audit to be made of all accounts of the City by a certified public accountant. The certified pubic accountant selected shall have no personal interest, directly or indirectly, in the financial affairs of the City or any of its officers. Upon completion of the audit, copies thereof shall be placed on file in the City Secretary’s office as a public record.