C) From time to time, Buyer may request and authorize services not describe in Schedule A (Additional Services). Except as hereinafter provided, such additional services will be governed by the term and condition of this agreement and any corresponding purchase order. If and when Buyer and the Seller agree to include additional services under this agreement., Schedule A will be amended accordingly to reflect the additional services and other terms specific to the additional services. Once added, the additional services shall be deemed services for all other purposes under this agreement.