Self-liquidating debt evidenced by revenue bonds or notes shall not be excluded from nonelectoral debt for the purpose of establishing net nonelectoral debt until the following have been filed with the department:
(1) A statement by the proper officials of the local government unit certifying the amount of the debt, the project for which it was incurred and the nature of the revenues from which the debt is to be repaid.
(2) A certificate from a qualified professional engineer or architect, or other person qualified by experience appropriate to the project, estimating the revenues and operating expenses of the project and showing that the net revenues so estimated will be sufficient to pay the annual debt service as it falls due.
(3) An opinion of the bond counsel approving the issue to the effect that the holders of the bonds or notes have no claim upon the taxing power or tax revenues of the local government unit issuing the bonds or notes, but only claims upon the specific revenues pledged and rights to the enforcement of any covenants as to the levying or collection of rates and charges for the use of the project being financed or any covenants as to the assessment of benefits upon properties serviceable by the project as provided in the covenants with the holders of the revenue bonds.