I would have to reread it, but my impression is that the regulations apply to all federal institutions indefinitely. The fact that there is no list seems to imply as much. In addition, it forces departments that may never have had this reflex on official languages to look into it and see if there are any possible actions that are relevant to the communities.
I'll give you an example.
We recently saw in the media that the federal government wants to set up a naval base in Baie‑Comeau or Moncton. What does it mean to set up a National Defence naval base in Moncton? It would deliberately be set up there. Francophones live there.
What does that mean in terms of access to health services and adding child care spaces and spaces in primary, secondary and post-secondary educational programs?
It can take many other forms. However, it can't be said that these structuring decisions have no effect on official languages. We have to get rid of the old ways that make some federal institutions think, time and time again, that official languages are the responsibility of Canadian Heritage and not theirs.