I think I'm reading too deep into the rules, but I really want to make sure we are doing it right haha. The interaction does not cost an action, but it never stops being an action per se. Because of that, I think you can only do when you can do actions in general, and that's only during your own activation, not during interrupts.

Ok, so tonight we played this map and we have a rulling question. The mission says "A figure can spend 2 movement points to retrieve a spice barrel without using an action". Because of that, the Imperial player argued that he could use the abilities "Order" and "Executive Order" from the Imperial Officers to retrieve the spice barrels with other figures. Is that correct? The issue comes from reading the rulebook. There says that "Retrive" is an interaction, and since an interaction is an action, you can't do anything during the interruption besides the movement action.