I don't want to go too far in answering this question, but according to the Treasury Board's policy, in areas where services to the public are to be provided in both languages, francophones can obtain a response in French. For that to be the case, the area must be designated as bilingual. However, internally, employees have the right to be served in the language of their choice when it comes to payroll services and other similar services.
On December 10th, 2013. See this statement in context.