International Traffic in Arms Regulations, 22 C.F.R. §§ 120-30.
The U.S. Department of State, Directorate of Defense Trade Controls (DDTC), regulates items and information inherently military in design, purpose, or use through the International Traffic in Arms Regulations (ITAR). Referred to as "defense articles," such items are found on the U.S. Munitions List. 22 C.F.R. § 121. Certain information related to Defense Articles is referred to as "technical data." Licenses are required for the export of Defense Articles and Defense Services to every country. There may be items that are not inherently military that are included on the USML, such as satellites or items that incorporate a defense article.
Department of State – https://www.pmddtc.state.gov/