Space A System Map: Space-A travel is a means by which members of United States Uniformed Services (United States Military, reservists and retirees, United States Department of Defense civilian personnel (under certain circumstances), and these groups' family members, are permitted to travel on aircraft under the jurisdiction of the United States Department of Defense when excess capability allows.
The Department of State Standardized Regulations (DSSR) governs allowances and benefits available to U.S. Government civilians assigned to foreign areas. Note that because individual agencies may draft their own implementing regulations, which can be more restrictive than the DSSR, you may not be eligible for all of the allowances listed below. Employees should check both the DSSR and their agency’s implementing regulations for guidance on a specific allowance. Employees of Defense Agencies should refer to Joint Travel Regulations (JTR Vol II Civilians), Chapter 5 (C5010) at http://www.defensetravel.dod.mil/site/travelreg.cfm and DoD 1400.25-M, Civilian Personnel Manual, Subchapter 1250 at http://www.esd.whs.mil/Portals/54/Documents/DD/issuances/140025/1400.25-V1250.pdf.