A regional recycling and waste management district may issue revenue bonds for the acquisition or betterment of facilities for the district's solid waste management program, for closure, postclosure, and contingency costs for solid waste facilities, for responses to releases from solid waste facilities, and for refunding outstanding revenue bonds. The district's revenue bonds may be payable from net revenues in excess of current reasonable and necessary costs of operation and maintenance or from gross revenues. Gross and net revenues may be derived from general rates and charges established as provided in § 34A-16-20 and from payments from contracts pursuant to §§ 34A-16-12 , 34A-16-13 , 34A-16-19 , and