The national legislative body of the Episcopal Church. It consists of a House of Bishops, which includes all active and retired bishops, and a House of Deputies, which includes four lay persons and four clergy from each diocese, each area mission, and the Convocation of the American Churches in Europe. The Convention meets every three years. The Houses meet and act separately, and both must concur to adopt legislation. The General Convention alone has authority to amend the Prayer Book and the church's Constitution, to amend the canons (laws) of the church, and to determine the program and budget of the General Convention, including the missionary, educational, and social programs it authorizes. A majority of bishops may request the Presiding Bishop to call a Special General Convention. Special General Conventions met in 1821 and in 1969. The General Convention elects twenty of the forty members of the Executive Council, which administers policy and program between the triennial meetings of the General Convention.