Both SAS and ATT require force trim to be on to work. If force trim is off, the SAS actuators will move the cockpit controls instead of the rotor head.
That might need some clarification Shawn - clearly it is not the case that an aircraft with the trim turned off (or FTR depressed) is no longer stabilised by the SAS.........I'm assuming you mean the pilot's grip becomes the force against which the SAS actuator works?