This subtitle does not apply to any vehicle procurement contract or subcontract that involves a purchase of $16,000 or less. This subtitle does not apply to the purchase of any passenger cars and trucks that the City Purchasing Agent has certified in writing are:not produced in sufficient quantity in the United States to meet the agency’s requirements; or not available in the United States in the necessary time to meet the agency’s requirements. City Code, 1976/83, art. 1, §237 Ord. 91-773