Hawaii Revised Statutes Division 1. Government § 39-61

(a) The department issuing revenue bonds pursuant to this part shall impose, prescribe, and collect rates, rentals, fees, or charges for the use and services of, and the facilities and commodities furnished by, the undertaking or for the use and services and benefits of the loan program for which the revenue bonds are issued, and shall revise the rates, rentals, fees, or charges from time to time whenever necessary, so that, together with the proceeds of the user taxes derived with respect to the undertaking pledged to the payment of those revenue bonds, the undertaking or loan program shall be and always remain self-sustaining. The rates, rentals, fees, or charges imposed and prescribed shall produce revenue which, together with the proceeds of the user taxes, will be at least sufficient:

(b) The legislature hereby covenants, pledges, and obligates itself, whenever it shall have authorized the issuance for an undertaking or loan program of revenue bonds payable from and secured by the user taxes derived with respect to the undertaking, or payable from and secured by user taxes and the revenue, or any combination of both, of the undertaking or loan program to impose, or continue to impose, user taxes with respect to the undertaking in amounts at least sufficient, together with the revenue of the undertaking or loan program pledged to the payment and security, so that the undertaking or loan program shall be and always remain self-sustaining, and all payments referred to in subsection (a), including reserves therefor, may be made when due, and that compliance with any covenants referred to in the provisions is assured.