Therefore, the parties agree that the 1983 agreement, as subsequently amended, will be amended and replaced to read that the educational district is also empowered to establish a not-for-profit corporation to exercise its powers. a common authority differs from the member authorities; they have separate operational boards of directors. These bodies may be assigned each of the powers inherent in all participating agencies. The authorisation agreement defines the powers that the new authority may exercise. The duration, membership and rules of procedure of the Bureau of the Authority shall also be specified. The joint authority may employ staff and set policies independently of the constituent authorities. .