IDPO orders shall be numbered in accordance with the uniform procurement instrument
identification numbering (PIIN) system. The initial purchase order and subsequent orders shall be distinguished by a "D" in the ninth position and a "5" in the tenth position of the PIIN. The initial purchase order shall be numbered with sub -PIIN number 0001. Subsequent orders shall be serially numbered with sub -PIIN numbers 0002 through 9999. Unless the contracting officer determines otherwise, the IDPO will be held in an open status in the SAMMS Active Contract File until the end of the ordering period or until the final payment has been made on all orders, whichever is later.
