1.1 Seller shall provide the Services, including fabricate, sell, and deliver to Port Authority the Material and train Port Authority personnel as necessary in operation of the Material; provide with delivery the agreed-upon spare parts; provide all manuals of Material operation, maintenance, and troubleshooting guidelines; furnish all required insurance; and otherwise perform the Services in strict accordance with the Contract Documents, including within the Contract Time and any Milestones, for the Contract Price. 1.2 No Contract shall become effective or binding upon the Port Authority until the appropriate financial officer for the Port Authority certifies that funds are or will be available to meet the Contract pay requirements when due. 1.3 The Procurement Director shall prepare a Purchase Order on the form prescribed by the Port Authority and mail or otherwise deliver the same along with one fully executed copy of all other Contract Documents to Seller. Seller is authorized to begin performance of the Contract only when the Port Authority has issued a fully executed Purchase Order and only after the effective date of the insurance required by the Contract Documents. If Seller begins performance prior to issuance of a fully executed Purchase Order, it does so at its own risk and agrees to assume all responsibility therefor, to bear all costs attributable thereto, including, without limitation, all costs associated with Port Authority consultants, and to be liable for all damages caused thereby. Seller acknowledges that the Port Authority has no liability to or obligation to pay Seller for any Material manufactured or other Services unless it issues a Purchase Order for any such Material or Services, and such Material and Services are included in the Contract Price.