Here are a couple more links from the PEO website that are more explicit about the term "engineer".[1][2] Admittedly I don't know if the claims here are accurate or not, the Professional Engineer Act [3] is too legalese for me to decipher.

[1] http://www.peo.on.ca/index.php?ci_id=2075&la_id=1#whypeng [2] http://www.peo.on.ca/index.php?ci_id=2075&la_id=1#aftergrad [3] https://www.ontario.ca/laws/statute/90p28#BK36