All powers vested in the toll bridge authority as of September 21, 1977, relating to the acquiring, operating, extending, designing, constructing, repairing, and maintenance of the Washington state ferries or any part thereof and the collecting of tolls and charges for use of its facilities, shall be performed by the department. The commission shall determine all fares, tolls, and other charges for its facilities and shall directly perform all duties and exercise all powers relating to financing, refinancing, and fiscal management of the system's bonded indebtedness in the manner provided by law.