When Playing "Into the Pit", which I think is the first scenario in the Khazad-Dum set, there is a location card called "Zigil Mineshaft". Its wording says: Action: Raise each player's threat by 1 to place 1 progress token on Zigil Mineshaft.
My question is: Does this Action only apply when Zigil MIneshaft is the active location, or can we trigger this action during any action window as many times as we want to place enough progress tokens to get rid of this location while it is still in the staging area?