Canada's dollar-for-dollar retaliation against US Section 338 duties remains scheduled for 12:01 a.m. September 8, three calendar days from September 5.
The US 50 percent additional tariff on selected Canadian goods entered its fifteenth day on September 5, continuing the August 22 effective cycle.
Finance Minister Francois-Philippe Champagne published the counter-tariff schedule on August 25 with a Canada.ca table update on August 26.
Canada's measures apply to roughly C$27.6 billion of US-origin imports at rates of 15, 25, or 50 percent matching corresponding US Section 338 and Section 232 lines.
Steel and aluminum products remain at 50 percent, doubling prior 25 percent surtaxes. Dairy, appliances, pulp and paper, electronics, furniture, and clothing stay in scope.
Goods already in transit to Canada on the effective date are exempt, a screening detail importers are working through ahead of the September calendar.
Elemental sulfur, HS 2503, remains absent from both the US covered lists and Canada's published September 8 retaliation table.
Canada's customs tariff schedule continues to list sulfur of all kinds, other than sublimed, precipitated, or colloidal sulfur, at free under heading 2503.00.00.
Energy, potash, fish, and critical minerals also stay outside the exchange on open reporting, though fish and seafood were removed from Canada's retaliation side in the revised August 26 list.
Canada remains the dominant US import source for recovered sulfur per USGS import-source tables, so a tariff-free HS 2503 lane keeps the cross-border molten and solid corridor commercially open.
SMM's June Canadian export print showed 158,031 tonnes to the United States, underscoring how much of the Alberta book still clears south as well as west through the Vancouver stem.
Pacific loadings have been the swing-supplier answer while Middle East seaborne stays impaired. Alberta forming plants and British Columbia terminals face no new duty layer on sulfur even as steel and appliances enter the retaliation cycle.
Desk read: no change to sulfur duty treatment on either border on September 5. The three-day countdown to Ottawa's published retaliation lines is the calendar item; HS 2503 remains off both schedules.