a. Every commission is authorized to enter into contracts with the United States of America, or with any department, institution or agency thereof, on such terms and conditions as the commission may approve, providing for or relating to the treatment and disposal of sewage or industrial wastes of or originating in or on any reservation, property, institution, building, or structure within the district owned or under the control of the United States of America, or any department, institution or agency thereof, by means of the sewage disposal system or such other facilities as the commission may determine to provide for such purpose, or in such other manner as the contract may provide.
b. Every commission is authorized to provide, construct, operate and maintain facilities for the treatment and disposal of industrial wastes originating in the district, and to enter into contracts with any person, on such terms and conditions as the commission may approve, providing for or relating to the treatment and disposal of any such industrial wastes.
c. Every commission is authorized to enter into contracts with any person owning or operating any sewer system within the district or engaged in treatment or disposal of sewage or industrial wastes originating in the district, on such terms and conditions as the commission may approve, providing for or relating to the treatment and disposal of any sewage or industrial wastes collected in such sewer system or by such person.