This EO limits "stacking" for certain listed tariffs (auto, border security, steel/aluminum), ensuring only one applies to an article from those specific categories to avoid cumulative duties deemed unnecessary. This order appears to be a strategic adjustment, potentially recognizing that cumulative effects of disparate tariff actions created unintended consequences or exceeded policy goals. It rationalizes specific tariff applications but leaves other significant tariffs untouched, suggesting a targeted recalibration rather than a wholesale shift in trade policy. The retroactive application introduces administrative burden.