The DoD Savings Deposit Program (SDP) was established to provide a place to deposit money for savings purposes to members of the Uniformed Services who serve in designated duty assignments outside the United States or its possessions.

Air National Guard Service members on drill status are not eligible for the Savings Deposit Program. Only service members permanently or temporarily assigned to designated duty assignments outside of the United States are eligible to participate in the SDP. 

For more information about the Savings Deposit Program, please visit the local finance office or the Defense Finance and Accounting Service website:
https://www.dfas.mil/MilitaryMembers/sdp

DoD Financial Management Regulation:
https://comptroller.defense.gov/Portals/45/documents/fmr/current/07a/07a_51.pdf