— Identity Screening Regulations5.2 (1) An air carrier shall not transport a passenger if …
(c) the passenger does not appear to be of the gender indicated on the identification he or she presents;
Body identity not match you ID. An airline can arbitrarily refuse to fly you.
More info here http://chrismilloy.ca/2012/01/trans...ely-banned-from-boarding-airplanes-in-canada/