The authority for the establishment of the CARs is the Aeronautics Act.
[4] Part V (Airworthiness) of the CARs is uniquely numbered to match the US FAA FARs parts as well as the EASA and JAA regulations.
[6] Transport Canada also makes available other publications, known as Advisory Circulars,[7] that are intended to assist companies and individuals governed by the CARs comply with the regulations and standards.
Prior to 1 Feb 2007, these were divided into other groups called Commercial and Business Aviation Advisory Circulars (CBAACs),[8] General Aviation Advisory Circulars (GAACs),[9] Aerodrome Safety Circulars (ASCs),[10] General Aviation Policy Letters (GAPLs),[11] and Maintenance and Manufacturing Policy Letters (MPLs).
[12] Although these alternate documents are no longer issued or amended, historical versions of those that have not been cancelled remain in effect.