This Canadian work is in the public domain worldwide because it was subject to Crown copyright and was first published before December 31, 1973.
According to Public Works and Government Services Canada / Travaux publics et Services gouvernementaux Canada, Canada has no intention of renewing expired Crown Copyright works in any country, and consequently the URAA does not apply. An email is on record at ticket:2013122310013986.
Source: House of Commons 1949 http://www2.parl.gc.ca/Parlinfo/Files/Parliamentarian.aspx?Item=100769e9-710c-4d67-8e3a-77ef5e47b396&Language=E&MenuID=Lists.Members.aspx&MenuQuery=http%3A%2F%2Fwww2.parl.gc.ca%2FParlinfo%2FLists%2FMembers.aspx%3FParliament%3