The California Cap-and-Trade Program and Québec Cap-and-Trade System have been linked since January 2014. Linking enables compliance instruments to be traded and used interchangeably across the linked programs. These documents introduce an accounting mechanism developed pursuant to Article 8 of the Agreement on the Harmonization and Integration of Cap-and-Trade Programs for Reducing Greenhouse Gas Emissions (2017 Linkage Agreement) that identifies and accounts for compliance instruments traded between jurisdictions and retired in the WCI linked carbon market. For more information see Net Flow of Compliance Instruments.