Treaties — Special kinds of — Most-favoured-nation clause — Countervailing duties imposed to counteract alleged export subsidy — Whether imposition in breach of most-favoured-nation clause — Trade Agreement between United States and Uruguay, 1942 — The law of the United States of America.

Treaties — Interpretation of — Most-favoured-nation clause in Trade Agreement between United States and Uruguay, 1942 — Whether imposition of countervailing duties violates clause — Whether foreign multiple exchange rate system justifies countervailing duties when such system was approved by International Monetary Fund — The law of the United States of America.