The prime minister is appointed from the representatives by the governor-general, who has a constitutional duty to select someone who is likely to command the support of the majority of the representatives. In practice this would normally mean the leader of the majority party or coalition. If there is no suitable candidate, then the governor-general can dissolve the assembly and trigger a general election. Other ministers are also appointed by the governor-general, on the advice of the prime minister (and so effectively by the prime minister). The prime minister can be removed from office by the assembly, or by the governor-general if he feels that the prime minister no longer enjoys the support of the majority of representatives. The assembly is elected every five years unless the governor-general dissolves it before the end of this period, which he may do on the advice of the prime minister.