(U.S.) Under Section 232 of the Trade Expansion Act of 1962, as amended, the U.S. Department of Commerce determines whether articles are being imported into the U.S. in quantities or circumstances that threaten national security. Based on the investigation report, the president can adjust imports of the article(s) in question.
The U.S. Department of Commerce must report on the effects these imports have on national security and make recommendations for action or inaction within 270 days after starting an investigation. Within 90 days of the report, the president decides whether to take action to adjust imports on the basis of national security. The president must notify Congress of his decision within 30 days.