All bonds issued pursuant to this part and the income therefrom shall be exempt from all taxation by the State or any county or other political subdivision thereof, except inheritance, transfer, and estate taxes. Interest and principal payments of the bonds shall be a first charge on the general fund of the State. The full faith and credit of the State shall be and they are hereby pledged to the punctual payment of the principal thereof, and interest thereon, as the same shall become due, irrespective of whether or not the pledge be stated in the bonds, and sufficient revenues shall be raised or provided from time to time for the purpose of payment.
HRS § 39-11