The current Bunreacht na hÉireann, Constitution of Ireland, came into force on the 29th December 1937.
The Constitution can only be changed by a referendum of Irish citizens over 18 years old, voting on a proposal drafted by the house of parliament.
An independent body- formerly the Referendum Commission (an Coimisiún Reifrinn), and now the Electoral Commission (An Coimisiún Toghchanáin) - is responsible for explaining the subject matter of referendum proposals, and encouraging a strong voter turnout.
If the people agree, the act amending the Constitution has to be passed by both Houses of the Oireachtas
The current collection are shelved on Level 2 the entrance level of the Law Library