Registration with the Directorate of Defense Trade Controls (DDTC) is required for any person who engages in the United States in the business of manufacturing or exporting defense articles or furnishing defense services. Registration is required even for one-time exports and is not limited to large companies. Items can fall under ITAR control even if they have commercial applications or are not sold directly to the military. Registered companies must comply with ongoing obligations such as annual renewal, naming empowered officials, and implementing export compliance policies and training.