PAL = Posession & Acquisition License.
A standard PAL allows you to posess and acquire non-restricted firearms, including airguns rated as such.
The PAL can be endorsed to allow you to posess and acquire restricted firearms, such as handguns and restricted rifles as well.
To get a PAL, you have to take a course, and pass a test. You can also challenge the test if you think you have sufficient knowledge of the subject matter.
More info can be found here:
http://www.cfc-cafc.gc.ca
HTH
(looks like sniper types faster than I do - LOL !)