The United Methodist Church is organized into conferences. The highest level is called the General Conference and is the only organization which may speak officially for the church. The General Conference meets every four years (quadrennium). Legislative changes are recorded in The Book of Discipline which is revised after each General Conference. Non-legislative resolutions are recorded in the Book of Resolutions, which is published after each General Conference, and expire after eight years unless passed again by a subsequent session of General Conference. The last General Conference was held in Tampa, Florida, in 2012. The event is currently rotated between the U.S. jurisdictions of the church. The 2016 General Conference will be in Portland, Oregon. Bishops, Councils, Committees, Boards, Elders, etc., are not permitted to speak on behalf of The United Methodist Church as this authority is reserved solely for the General Conference in accordance with the Book of Discipline.