The Canadian Air Transport Security Authority was officially formed April 1 , 2002 , following the terrorist attacks on September 11 , 2001 in the United States . After September 11 , 2001 , the Government of Canada took responsibility for airport screening which , until then , was the responsibility of the airlines as per direction from Transport Canada . The Canadian Air Transport Security Authority Act ( Budget Implementation Act , 2001 ) provides additional security requirements as prescribed under the '' Aeronautics Act ''
terrorist attacks on September 11 , 2001
September 11 attacks
Canadian Air Transport Security Authority