The United States government and its export regulations restrict or prohibit U.S. individuals and companies from exporting or providing services of any kind to any party contained in U.S. government export denial, debarment, and blocked persons lists.  These lists are updated on a regular basis.  A restricted party screening involves a review of these lists to ensure that the person or entity with whom you are interacting is not on one of these lists.  The University has a site license to software which provides easy-to-use screening for denied parties.