How Transport Canada does things is often a million dollar question and why people make a lot of money as contractors.
But, as always the CARS and Google can be your friend:
http://https://www.tc.gc.ca/eng/civi...086.htm#421_40
Foreign Applicants are nearer the bottom, after the DND applicants. Only you can answer whether you meet the specific requirements as laid out, so perhaps a call or visit to your local office is in hand (call first, as some are appointment only now).