C11.9.1. Definition and Purpose. Authorized in 1981 under Section 51 of the Arms Export Control Act (AECA) (22 U.S.C. 2795), the SDAF is a revolving fund that finances the acquisition of defense articles and services in anticipation of their future sale to foreign governments and international organizations. Pursuant to 10 U.S.C. 114, the authorized value of the Fund is $1.07 billion. The Fund enhances the USG’s ability to meet the urgent military needs of our international partners by allowing for the faster delivery of items and services once agreements on foreign military sales are signed. Congress amended the SDAF statute in 1989 to allow for the procurement of defense articles and services for narcotics control purposes.