Since all timed buildings are counting down you could say they are in the process of expiring the moment they are placed. "Expiring" is a word that means "sometime in the future this process will be ended," or something like that.You can't teleport
#1 means you can't teleport portals, chapter 14 guest race buildings, amuni prestige buildings, welcome square in chapter 10, the two embassies in chapter 16, flagships and large ships in chapter 17,...
- Buildings where there is a limit on how many you can build
- Expiring buildings
- There may be other?
#2 I expect this means that we can't teleport the towers in chapter 19 (I am not there yet, so can't check)
So, the question is: Can you teleport a building set to expire before it actually expires? If this is what you meant, then "Expiring building" refers to a class of buildings, sense the process of expiring refers to all timed building. But if you can teleport a timed building before it actually expires, then "Expiring building" should be "Expired building," and refers to the ongoing process of expiring.
Inno apparently agrees with you; from the Wiki:To me expiring buildings is a class of buildings