US SB691

Amends the Tariff Act of 1930 to establish special rules for "successive investigations" allowing the International Trade Commission to consider findings from recent or concurrent antidumping/countervailing duty cases when evaluating material injury from similar merchandise

Addresses cross-border subsidies by allowing countervailing duties on subsidies provided by third-country governments to multinational corporations, and permits cumulation of transnational subsidies with domestic subsidies in the subject country

Strengthens circumvention inquiry procedures with specific timelines (150 days for preliminary determinations, 150 days for final determinations), mandatory suspension of liquidation upon affirmative findings, and new certification requirements for importers

Creates authority to countervail currency undervaluation by requiring Commerce to examine whether government currency manipulation provides countervailable subsidies, with benefit calculated based on the difference between actual and non-undervalued exchange rates

Imposes new asset requirements on nonresident importers, requiring them to maintain U.S. assets sufficient to cover potential duties, with civil penalties up to $50,000 per violation for non-compliance