(90) The Governmentwide commercial purchase card may be used as a method of purchase and/or payment for purchases and orders under exiting indefinite delivery/indefinite quatinty contracs, and for other contracts whgen the contract authroizes its use as an ordering/payment method. Procedureal guidance on use of the purchase card is in the DLA Government PUrchase Card Program One Book Chapter, DLA Governmentwide Comercial Purchase Card Program.