(a) Payment of principal and interest on the bonds shall be paid from the Petroleum Storage Tank Trust Fund Revenue Bond Debt Service Fund when due.
(b) If and so long as all payments of debt service are properly made, on the last day of each fiscal quarter the pledged fees remaining in the Petroleum Storage Tank Trust Fund Revenue Bond Debt Service Fund in excess of a reserve of two (2) months' requirements of debt service shall be withdrawn from the Petroleum Storage Tank Trust Fund Revenue Bond Debt Service Fund and deposited into the Petroleum Storage Tank Trust Fund as special revenues.
(c) The interest on the bonds shall be exempt from state, county, and municipal income, inheritance, and estate taxes.