War chest - workings

Couldn’t find the answer or the answer is stuck in the forums to lengthy to weed through.

I understand this much - Individual members who leave the alliance will not keep the war chest points

What if the individual member opts out of alliance wars when they opt back in will the war chest points they earned will they still be there?

If the alliance is opted out of war (by TL) do the war chest points remain the same until they opt back in? or do they all lose the war points cause the alliance was opted out?

War chest is new still trying to get my mind around it.

Much appreciated for some feedback