I would expect everyone to have the same firegrounds/tacs in thier radios,.. with private use tg's for thier supervisors etc... With the fg's assigned on a per usage basis to each individual dpt.... And the medcom tg's would be universal as they all encode to the same hospitals correct?
Ex- Dispatch A, with maybe a B
Tac A, B, C, D, etc. assigned as needed..
Private/Command/Admin for each dept.
Common/Mutual aid
Possibly a Training for each dept
Med TG's for each Hospital ER...
A common Medcom
This of course would be the logical way to do it.. but then again I don't know if the Parish Admin is on the same brain wave LOL