D. Any bonds or other obligations issued hereunder shall be payable from and be secured by the pledge of the revenues derived from the operation of the pipeline system or systems, as constructed, acquired, extended or improved with the proceeds of the bonds, subject only to prior payment of the reasonable and necessary expenses of operating and maintaining the system or systems. Any holder of the bonds or other obligations or of any of the coupons thereto attached may by appropriate legal action compel performance of all duties required of the commissioner in order to enforce payment of the bonds when due. If any bonds or other obligations issued hereunder are permitted to go into default as to principal or interest, any court of competent jurisdiction may, pursuant to the application of the holder of the bonds or other obligations, appoint a receiver for the system or systems who shall operate the system or systems and collect and distribute the revenues thereof pursuant to the provisions and requirements of the commissioner's written authorization for the bonds. If more than one series of bonds or other obligations is issued hereunder payable from the revenues of the system or systems, priority of lien on such revenues shall depend on the time of the delivery of the bonds or other obligations each series enjoying a lien prior and superior to that enjoyed by any series of bonds or other obligations subsequently delivered, except that where provision is made in the proceedings authorizing any issue or series of bonds or other obligations for the issuance of additional bonds or other obligations in the future on a parity therewith pursuant to procedure or restrictions provided in such proceedings, additional bonds or other obligations may be issued in the future on a parity with such issue or series in the manner so provided in such proceedings.