Canada gazette Part III (Check under heading “Proclamations of Canada and Orders in Council relating to the coming into force of Acts”).
See also the Quarterly Index of the Canada Gazette Part II and subsequent issues http://canadagazette.gc.ca/rp-pr/p2/index-eng.html
Further Reading
McCormack, N, and Léonard, N: Updating Statutes and Regulations for all Canadian Jurisdictions
Coming into force and proclamation information for all jurisdictions is available in Canadian legislative pulse.
See Effective Date under specific bills, and the Other Proclamations tabs for proclamations for bills from sessions not carried in the Canadian Legislative Pulse.