The Treasure Island Development Authority Board of Directors makes policy decisions critical to the future of former Naval Station Treasure Island, approves large contracts, approves TIDA's annual budget, and acts as both the development agency and the trustee of the Tideland Trust for Treasure and Yerba Buena Islands. All seven members are appointed by the Mayor of San Francisco, with certain appointments approved by the San Francisco Board of Supervisors. The member of the San Francisco Board of Supervisors who represents Supervisorial District 6, which includes Treasure Island and Yerba Buena Island, sits as an ex-officio, non-voting member of the Board of Directors.