Because the contract or purchase order (PO) is a legal document that represents, or forms the basis of, the contractual relationship between the Town and a vendor, any changes to that contract must be in writing. When change orders are needed, they must be approved in the same sequence as the initial contract or PO, up to and including approvals by the Comptroller, Town Administrator, or designees. Any payments to the vendor will be delayed while proper documentation is completed. Furthermore, the contractual rights of the Town and the vendor are jeopardized by such unauthorized changes.