The Government of Ireland is the executive authority of Ireland, headed by the taoiseach, the head of government. The government – also known as the cabinet – is composed of ministers, each of whom must be a member of the Oireachtas, which consists of Dáil Éireann and Seanad Éireann. Ministers are usually assigned a government department with a portfolio covering specific policy areas although provision exists for the appointment of a minister without portfolio.