I think I know the answers to these questions already, but just to be sure: let's say that I have a ship that's about to stress itself with something like Push the Limit, and I want Yorr to receive the token. However, I'm not entirely sure Yorr is within range and I don't want to PtL if he is unable to take the token. Can I check if he's in range before comitting to the PtL? My initial thought is no, because his ability doesn't activate until I do.

Similar idea with Etahn: when do you check his ability? His ability's "activation clause" reads "When an enemy ship inside your firing arc at Range 1-3 is defending", which I'm assuming means that you can check Etahn's range and arc as soon as your other ship declares a target, but not before, so you can't check which targets Etahn can affect before picking yours.