I think it would be great if there was a simple function for Callouts to be able to be assigned to a specific Department. For example, a callout designed for the city wont get assigned for a department in sandy or whatever.
This would also be cool as in the future devs could make callouts for EMS, and then only EMS would get the callouts that are related to them etc. If this was a thing, maybe also make players able to do EMS things on AI like try to revive them.
The reason that I am suggesting this is because it is a thing that can be done in LSPDFR and it would open a variety of different types and styles of callouts. It would also open FivePD to more than just people who want to RP as police and can take part as being other emergency services.