The tariffs must be imposed through executive actions including bills signed by the President or actions by the Department of Commerce. The tariffs must be in effect for at least some businesses during the specified period to qualify. Conditional tariffs (e.g., "Tariffs will be imposed if...") do not satisfy the criterion until they are actually imposed. The market resolves based on tariffs that are announced and take effect, not merely proposed or threatened. Increases to existing tariff rates count as new tariffs. Tariffs can be sector-specific or apply broadly. Trade blocs like the European Union can be specified as the country. "Any country" or "any sector" options resolve to Yes if tariffs are imposed on at least one country or sector respectively.

Note: Trump's tariffs on medium and heavy-duty vehicles, parts, and buses (proclaimed Oct 17) do not count because qualifying executive actions must be taken after Issuance.