The Washington toll bridge authority is authorized to issue revenue bonds to refund all or any part of the authority's outstanding 1955 Washington state ferry system refunding revenue bonds and 1957 ferry and Hood Canal bridge revenue bonds. With respect to the issuing of such bonds and the payment of principal and interest thereon, the payment into reserves, sinking funds, and the fixing and revision of charges for services and facilities of the system, and in managing all its fiscal operations, the authority shall have all the powers and shall follow the same procedures established for it under existing laws, except as otherwise provided herein.