Please send all product information and catalogs to the address listed under the General Information heading. For new products, equipment, materials, or services in which the City may be interested contact the Purchasing Division. If the product requires testing, the Purchasing Division may test it or refer you to the appropriate department. You may make sales demonstrations, offer trial materials, etc, without obligation to the City. ONLY THE PURCHASING DIVISION (WITH CITY COUNCIL APPROVAL, WHEN REQUIRED) IS AUTHORIZED TO COMMIT THE CITY FOR THE PURCHASE OF MATERIALS, SUPPLIES, EQUIPMENT AND SERVICES. No payment will be made for any goods or services delivered without an approved purchase order or contract number.