Canadian softwood lumber has been subject to long-running antidumping and countervailing duty orders administered by the US Department of Commerce. Importers must deposit estimated duties at entry and are subject to administrative reviews that can result in retroactive adjustments. The measures apply at the tariff-line level by species and province of origin, so detailed documentation of species and mill location is essential.

Several tropical species covered here — including Swietenia mahogany and certain teak — are listed under CITES appendices, requiring export permits from the country of origin and import documentation demonstrating legal harvest. Importers should also be prepared to comply with the Lacey Act, which requires a declaration of the scientific name, country of harvest, and quantity for wood products.