In a deliberative assembly, a motion of no confidence is a motion declaring that a government or an officer, typically a government executive, is not fit to hold office. A vote on such a motion is a vote of no confidence; the corresponding inverses are a motion and vote of confidence. The no-confidence vote is a defining constitutional element of a parliamentary system, in which the mandate of the government or its officers relies on the continued support, or at least non-opposition, of the majority in the legislature. Systems differ in whether the motion may be directed against the prime minister, the government as a whole, individual cabinet ministers, the cabinet as a whole, or some combination of these.