Indeed, just like any institution that calls on a third party to provide a service on its behalf, Air Canada has to ensure that the third party provides the service in both languages, as it itself would do. Jazz now covers a number of regional routes, but it is no longer a subsidiary of Air Canada. According to our interpretation, it is a third party operating on behalf of Air Canada. Air Canada must ensure that Jazz offers bilingual services.
On March 30th, 2010. See this statement in context.