No. Under USMCA/CUSMA the high tariffs (roughly 200-300%) on US dairy are the agreed over-quota rates only. Within TRQs, duties are zero. US dairy exports to Canada have never exceeded those TRQsโfill rates average well under 50% for most categoriesโso the high rates have not been applied. Disputes center on Canadaโs TRQ allocation methods, not on charging rates beyond the deal.