Dairy and poultry supply management in Canada
Canada's supply management (French: Gestion de l'offre), abbreviated SM, is a national agricultural policy framework used across the country, which controls the supply of dairy, poultry and eggs through production and import mechanisms to ensure that prices for supply-managed farmers are both stable and predictable. The supply management system was authorized by the 1972 Farm Products Agencies Act, which established the two national agencies that oversee the system.
Source: Wikipedia — Dairy and poultry supply management in Canada (CC BY-SA 4.0)