and southern denominational churches reunited. Structure Constitution The Constitution of PC(USA) is composed of two portions: Part I, the Book of Confessions and Part II, the Book of Order. The Book of Confessions outlines the beliefs of the PC(USA) by declaring the creeds by which the Church's leaders are instructed and led. Complementing that is the Book of Order which gives the rationale and description for the organization and function of the Church at all levels. The Book of Order is currently divided into four sections – 1) The Foundations of Presbyterian Polity 2) The Form of Government, 3) The Directory For Worship, and 4) The Rules of Discipline. Councils The Presbyterian Church (USA) has a representative form of government, known as presbyterian polity, with four levels of government and administration, as outlined in the Book of Order. The councils (governing bodies) are as follows: Session (of a Congregation) Presbytery Synod General Assembly Session At the congregational level, the governing body is called the session, from the Latin word sessio, meaning "a sitting". The session is made up of the pastors of the church and all elders elected and installed to active service. Following a pattern set in the first congregation of Christians in Jerusalem described in the Book of Acts in the New Testament, the church is governed by presbyters (a term and category that includes elders and Ministers of Word and Sacrament, historically also referred to as "ruling or canon elders" because they measure the spiritual life and work of a congregation and ministers as "teaching elders"). The elders are nominated by a nominating committee of the congregation; in addition, nominations from the floor are permissible. Elders are then elected by the congregation. All elders elected to serve on the congregation's session of elders are required to undergo a period of study and preparation for this order of ministry, after which the session examines the elders-elect as to their personal faith; knowledge of doctrine, government, and discipline contained in the Constitution of the church, and the duties of the office of elder. If the examination is approved, the session appoints a day for the service of ordination and installation. Session meetings are normally moderated by a called and installed pastor and minutes are recorded by a clerk, who is also an ordained presbyter. If the congregation does not have an installed pastor, the Presbytery appoints a minister member