I apologize if this has been asked and answered. I looked, but did not see it...
I know that "Lab" caches (Or Adventure Labs as they are now known) don't have all the same attributes as regular caches.
I wanted to do a challenge that required a certain number of caches (by type) in a certain number of states. Would that be possible for Lab caches? Do they have a "State" attached to them? Could a checker verify that someone has 5 labs in 5 different states?
The only attributes of lab caches which are retrievable by PGC are name (not allowed as a challenge condition), GUID (also not allowed) and visit date. So the only challenge conditions you could possibly include lab caches in are general counts (like find 1000 caches) and date-based (like streaks).