The provisions of this section are declaratory of existing law and shall not affect the validity of the authorization or issuance of any bonds by a county for sewage purposes. The board of directors of a sanitary district may charge and collect fees, including the fees listed in subsection G of this section, and sewer rentals and service charges for any service performed or property furnished by the district. Such fees and service charges shall not exceed the actual cost of performing such services.
State agencies are exempt from paying such fees and service charges.
Fees shall not be charged or collected by both the department of environmental quality and a sanitary district for the same service. The proceedings relative to the issuance of any bonds may provide for a pledge of all or any part of the revenues of the district derived from any source other than taxes levied pursuant to section 48-2025 as additional security and source of payment of all or any specific issue of the district's bonds. The pledge shall be supplemental to and not in lieu of the liability of all taxable real property for the payment of the bonds. The pledge may be secured by an assignment of all or a part of such revenues to a bank doing business in this state. The treasurer may be instructed by the board of directors of the district to make monthly, semiannual or annual payments to such bank to provide for payment of the bonds and coupons as the same shall mature.