The departments and Crown corporations, that is the institutions subject to the act, must carry out an exercise every 10 years. Let's take, for example, the Mississauga office of Canada Post, which serves a given region. Based on the census, it is determined whether 5% of the community is francophone or not. The designation of the office is assigned on that basis. Incidentally, this is a highly costly exercise for the departments and Crown corporations.
However, I know, since I have carried it out, that it is left to every department to determine the service area of the office. In the case of this example, a Canada Post office, the service area may prove to be so big that francophones represent only 5% of the population there. However, there may be three French-language schools, three francophone communities very close to the office. That's why it would be logical to offer the service, in my view.