a recent regulatory change that the Harper Conservatives have made to the Aeronautics Act (i.e. passed by ministerial fiat, rather than shepherded through Parliamentary process) that potentially affects many trans (and cis) Canadians and could even ban some from air travel:

Sec 5.2(1) An air carrier shall not transport a passenger if

• (a) the passenger presents a piece of photo identification and does not resemble the photograph;
• (b) the passenger does not appear to be the age indicated by the date of birth on the identification he or she presents;
• (c) the passenger does not appear to be of the gender indicated on the identification he or she presents; or
• (d) the passenger presents more than one form of identification and there is a major discrepancy between those forms of identification.

(more)

And here is the petition to turn around this ridiculous piece of regulation.