31-7-79. Liability on revenue certificates; tax exemption. 31-7-80. Form and contents of revenue certificates; validity of signatures thereon. 31-7-81. Confirmation and validation of revenue certificates. 31-7-82. Enforcement of rights of revenue certificate holders; procedure in event of default. 31-7-83. Investment of surplus moneys and moneys received through issuance of revenue certificates. 31-7-84. Payment for authority’s services and facilities; levy of tax by political subdivisions; compliance by authority with county budgetary procedures. Sec. 31-7-85. Contracts with political subdivisions.