The Government of Ireland

 Ireland is a parliamentary democracy. The National Parliament (in the Irish language, Oireachtas) consists of the President (an tUachtarán) and two Houses: a House of Representatives (Dáil Éireann) and a Senate (Seanad Éireann). The sole and exclusive power of making laws for the State is vested in Parliament. The functions and powers of the President, Dáil and Seanad derive from the Constitution of Ireland (Bunreacht na hÉireann) and law.
The Constitution of Ireland is the basic law of the State. It was adopted by plebiscite in 1937. It is the successor of the Constitution of Dáil Éireann (1919) and the Constitution of the Irish Free State (1922). The Constitution states that all legislative, executive and judicial powers of Government derive from the people. It sets out the form of government and defines the powers of the President, the two Houses of the Oireachtas and the Government. It also defines the structure and powers of the courts, sets out the fundamental rights of citizens and contains a number of directive principles of social policy for the general guidance of the Oireachtas. The Constitution may be amended only by referendum.

The Constitution outlines what are considered the fundamental rights of the citizen. The definition of rights in the Constitution covers five broad headings: personal rights, the family, education, private property and religion. (An excerpt from the Dept. of Foreign Affairs notes on the Government of Ireland)