Hey Brent.
In Brantford we run with a completely voluntary system for off hours. The system runs like this;
1) Qualified FPO’s are put onto a list (if they wish)
2) When an evening call occurs, the first person on the list is called and asked to attend. If they are not available, the second person on the list is then called.
3) If no one is available to attend the scene, the fire crews will remain on scene until the next normal working day and the CFPO will then assign someone to attend.
note: there is a rotation on the “first call”