Overlapping Zones

I have a board with several zones defined. Two of these zones overlap and are used at different times in the game - Zone 1 is used in the beginning and Zone 2 is used at the end.

Is there a way to deactive Zone 2 for a while and then reactivate it and deactivate Zone 1?

Is there an ‘is.active’ property for Zones? If so, I could set it to TRUE to activate it and FALSE to deactivate it.