The General Convention is the primary governing and legislative body of the Episcopal Church in the United States of America. With the exception of the Bible, the Book of Common Prayer, and the Constitution and Canons, it is the ultimate authority in the Episcopal Church, being the bureaucratic facility through which the collegial function of the episcopate is exercised. General Convention comprises two houses: the House of Deputies and the House of Bishops. It meets regularly once every three years; however, the House of Bishops meets regularly in between sessions of General Convention. The Bishops have the right to call special meetings of General Convention.