The head of state usually has the right to refuse the request, in which case the prime minister is required by convention or statute to resign. For example, in the case of a minority government, the head of state can deny the request for dissolution and ask the leader of another parliamentary party to form a government. In some cases, such as with the President of Ireland, there are specific limitations on when a head of state can refuse the request. Even then, the right is rarely exercised, as it is likely to precipitate a constitutional crisis (see, for example, the Canadian King–Byng Affair of 1926), and so it is possible that the right of a head of state to refuse a dissolution has become a lapsed power.