In parliamentary systems, governments are generally required to have the confidence of the lower house of parliament (though a small minority of parliaments, by giving a right to block supply to <answer>upper houses</answer>, in effect make the cabinet responsible to both houses, though in reality <answer>upper houses</answer>, even when they have the power, rarely exercise it). Where they lose a vote of confidence, have a motion of no confidence passed against them, or where they lose supply, most constitutional systems require either:
Which political division does not often utilize its power, if it has any?
upper houses