On Sept. 30, 2014, the United States, NATO, and Afghanistan entered into two international agreements which govern the legal status and requirements for those present in Afghanistan in support of Operation Freedom's Sentinel and Resolute Support - the U.S.-Afghan Bilateral Security Agreement (BSA) and the NATO-Afghan Status of Forces Agreement (SOFA). These agreements went into effect on January 1, 2015.
The Resolute Support Legal Advisor (RS LEGAD) is a military legal office charged with advising senior leadership on issues related to these agreements as well as guiding their implementation.
To comply with the BSA and SOFA, all contractors must have an AISA business license to operate in Afghanistan, and to gain entry to Afghanistan, contractors must have a passport and Afghan visa. These documents should be obtained prior to coming to Afghanistan and can take more than a month to obtain.
Please note, that U.S. and NATO forces, and their civilian components, may enter/exit Afghanistan with movement orders and military identification, and DO NOT require use of a passport or Afghan visa.
RS LEGAD has put together this FAQ for more information: Contracting in Afghanistan