644.500	Commissioners authorized to borrow $20,000,000 for control of water pollution. (3/29/1972)
644.502	Commissioners authorized to borrow additional $20,000,000 for control of ... (8/28/1983)
644.503	Commissioners authorized to borrow additional $35,000,000 for control of ... (8/28/1984)
644.504	Commissioners authorized to borrow additional $35,000,000 for control of ... (8/28/1987)
644.505	Bonds, when issued — denominations — interest, how set — form of bonds — ... (6/18/1991)
644.507	Exception to limitations on bond interest rates. (6/18/1991)
644.508	Borrowing additional sums, commissioners authority, state credit. (8/28/1997)
644.509	Debt authorization. (8/28/1999)
644.510	Bonds, how registered. (3/29/1972)
644.511	Additional bonds, how registered. (7/23/1973)
644.515	Bonds, how sold, deposits — proceeds — expenses of sale, how paid. (3/29/1972)
644.516	Additional bonds, how sold, deposits — proceeds — expenses of sale, how paid. (6/18/1991)
644.520	Proceeds of sale, how handled. (3/29/1972)
644.521	Proceeds of sale of additional bonds, how handled. (6/18/1991)
644.526	Investment of water pollution control funds — interest to accrue to fund. (8/28/1983)
644.530	Water pollution control bond and interest fund created, how used. (3/29/1972)
644.531	Water pollution control bond and interest fund, how used. (6/18/1991)
644.535	Water pollution control bond and interest fund, how deposited. (6/18/1991)
644.540	Tangible property tax, when levied. (3/29/1972)
644.541	Tangible property tax, when levied. (7/23/1973)
644.545	Water pollution control bond and interest fund money to stand appropriated ... (3/29/1972)
644.546	Water pollution control bond and interest fund money to stand appropriated ... (7/23/1973)
644.551	Additional bonds, principal and interest, how and when paid — repurchase when. (8/28/2010)
644.555	Treasurer to report on bond transactions to general assembly. (3/29/1972)
644.556	Treasurer to report on additional bond transactions to general assembly. (6/18/1991)
644.560	Bonds to be issued as funds are required — issuance by resolution of board ... (3/29/1972)
644.561	Additional bonds to be issued as funds are required — issuance by ... (6/18/1991)