Each franchisee shall maintain, at a single location in the Dallas-Fort Worth metropolitan area, adequate financial records documenting all of its solid waste collection service transactions within the city. The records must be maintained in accordance with generally-accepted accounting and government- auditing standards. The franchisee may be audited by the city as often as the director deems necessary to ensure that accurate franchise fee payments are received. A franchisee shall make its records available for inspection by the director at reasonable times upon request. (Ord. Nos. 21058; 21163; 26480; 26608)