Free Parks Canada discovery pass

Parks Canada is offering a free pass according to the terms and conditions "The 2017 Parks Canada Discovery Pass provides the passholder with unlimited entry to all participating National Parks, National Marine Conservation Areas and National Historic Sites administered by Parks Canada. (Note: Discovery Passes provide the holder with all of the opportunities and services that normally come with a daily entry pass or permit. Activities such as camping, tours, or parking that normally carry a separate fee may not be covered by the Discovery Pass. Camping fees are not included with the Discovery Pass).
U.S residents appear to be eligible.