The US 50% additional tariff on selected Canadian goods remained in force on August 30, the ninth calendar day after the August 22 effective time.
Prime Minister Carney's dollar-for-dollar retaliation is now nine days away, scheduled for 12:01 a.m. September 8.
Finance Minister Francois-Philippe Champagne published the 874-item counter-tariff table on August 25 with a Canada.ca update on August 26.
Open trade counsel from Blakes and FreightFigures describes Canada's list as matching US Section 338 and Section 232 lines at 15%, 25%, or 50% rates on roughly C$27.6 billion of US-origin imports.
Steel and aluminum move to 50%, doubling prior 25% surtaxes. Dairy, appliances, fish, pulp and paper, electronics, furniture, and clothing also appear on the published schedules.
Goods already in transit to Canada on the effective date are exempt, a screening detail importers are working through ahead of the September calendar.
US Customs and Border Protection issued CSMS 69606660 on August 21 with implementing instructions for Section 338 duties, including Chapter 99 HTSUS headings for entries filed on or after August 22.
Elemental sulfur, HS 2503, remains absent from both the US covered lists and Canada's published September 8 retaliation table.
Energy, potash, fish, and critical minerals also stay outside the exchange on open reporting.
Canada remains the dominant US import source for recovered sulfur per USGS Mineral Commodity Summaries import-source tables.
The cross-border corridor runs from Alberta forming plants through British Columbia terminals to US Gulf and inland phosphate consumers.
Washington has excluded potash, sulfur, and sulfuric acid from successive Canada tariff rounds since early 2025, including the August Section 338 proclamations.
Pacific loadings have been the swing-supplier answer while Middle East seaborne stays impaired. A tariff-free HS 2503 lane keeps that stem commercially open even as steel, dairy, and appliances enter the retaliation cycle.
Desk read: no change to sulfur duty treatment on either border on August 30. The nine-day countdown to Ottawa's published retaliation lines is the calendar item; HS 2503 remains off both schedules.