INDIAN  INCENTIVE  PROGRAM
"The Department of Defense (DoD) Indian Incentive Program (IIP)
motivates Prime contractors to utilize Indian organizations and
Indian-owned economic enterprises, by providing a 5% rebate to
Prime contractors on subcontracted work performed by an Indian
organization or on subcontracted commercial products
manufactured in whole or in part by an Indian organization. For
actions after 13 September 2001, sub-tier contractors who
subcontract to an Indian-owned firm are also eligible for incentive
payments."

                         (Source:  http://www.acq.osd.mil/osbp/programs/iip/index.htm)


Link to information about INDIAN INCENTIVE PROGRAM.