This document establishes the test criteria to demonstrate that a UCS and/or its components conform to the provisions of STANAG 4586. This document also defines the organisational responsibilities for validating that the UCS and its components conform to STANAG 4586 requirements at the desired Level of Interoperability (LOI). A NATO listing of STANAG 4586 conforming systems will be maintained by the Custodian. The list of conformant UCS systems and components will facilitate NATO operating forces in selecting and configuring respective national Unmanned Aircraft System (UAS) assets so as to achieve the desired level of UA interoperability in Joint@ Coalition Combined Operations.