Bible is authoritative primarily as a historical document of Christian origins. We should think in continuity with Scripture but not be bound by it. Over the centuries we have improved on biblical thought in a divinely approved progression of understanding. Bible is the Church's expression of faith. Authority is derived from the Church which God produced and directs.
Church gives authoritative teachings as it explains and expands what is said in the Bible.
Bible is the eternal Word of God written. It is authoritative in and of itself as the instrument of the Holy Spirit to call people to repentance and salvation. It judges all theologies and Christian traditions and has divinely direct authority without being mediated through anyone but the Holy Spirit. They no longer exist, but text critics seek to determine as closely as possible what these manuscripts said. A belief that the Bible is without error in its original autographs.