The movement of goods, services, workers, and investments across provincial and territorial boundaries represents one of the most significant operational realities for Canadian businesses operating beyond their home jurisdiction. While Canada functions as a single nation, the constitutional division of powers between federal and provincial governments has historically created a patchwork of regulatory requirements that can impede the free flow of commerce between provinces. The Canadian Free Trade Agreement, which came into force on July 1, 2017, stands as the primary intergovernmental mechanism designed to reduce these internal trade barriers and establish a framework for resolving disputes when they arise. For business owners, sole proprietors, and non-profit operators engaged in activities that cross provincial lines, understanding this agreement and its practical implications is not merely an academic exercise but rather a matter of operational necessity that can affect everything from where you can sell your products to which professional credentials you can rely upon when expanding your operations.
The constitutional foundation for interprovincial trade flows from several provisions of the Constitution Act, 1867, most notably section 121, which states that all articles of the growth, produce, or manufacture of any one of the provinces shall be admitted free into each of the other provinces. Despite the apparent breadth of this language, judicial interpretation over more than a century established that this provision primarily prohibits customs duties and tariffs between provinces rather than serving as a broad prohibition against all regulatory measures that might incidentally affect interprovincial trade. This interpretation left considerable room for provinces to enact legislation governing matters within their constitutional jurisdiction, including property and civil rights under section 92(13), natural resources under section 92A, and matters of a merely local or private nature under section 92(16), even when such legislation created practical barriers to businesses operating across provincial boundaries. The federal government retains authority over trade and commerce generally under section 91(2), but the interplay between federal and provincial powers in this area has produced a constitutional landscape where both orders of government maintain legitimate regulatory interests that must be balanced against the goal of seamless internal trade.