There is a narrow body of law dealing with (mostly trade) disputes (and since Trump's tariffs: 'co-operation') between various provinces, and sometimes the national government.
O. Reg. 287/25 - PUBLICATION AND REPORTING REQUIREMENTS
O. Reg. 286/25 - ADMINISTRATIVE PENALTIES
O. Reg. 199/25 - DEEMED CERTIFICATION
O. Reg. 505/10 - MONITORS FOR NON-GOVERNMENTAL REGULATORY AUTHORITIES
Minister of Transport as the Minister for the Purposes of the Free Trade and Labour Mobility in Canada Act, Order Designating the, SI/2025-90
Free Trade and Labour Mobility in Canada Regulations, SOR/2025-225 [not in force at 20 Jan 2026]
The author has waived all copyright and related or neighboring rights to this Isthatlegal.ca webpage.