Ireland has a parliamentary system of government consisting of a president and two houses - the Dáil Éireann and Seanad Éireann. The Dáil is directly elected by Irish and UK citizens over 18 using a single transferable vote system. It dissolves within 5 years but can be dissolved earlier. The Seanad is selected after Dáil elections through nominations. A general election is held within 30 days of the Dáil dissolving. The president is elected every 7 years by Irish citizens over 35 and must be nominated.