I suppose you are referring to the regions that are designated bilingual for language of work purposes. That is generally how it is formulated.
On March 7th, 2016. See this statement in context.
On March 7th, 2016. See this statement in context.
Executive Director, Official Languages Centre of Excellence, Office of the Chief Human Resources Officer, Treasury Board Secretariat
I suppose you are referring to the regions that are designated bilingual for language of work purposes. That is generally how it is formulated.
See context to find out what was said next.