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 such contract may provide.
b. Every commission is authorized to provide, contract, 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 disposing 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.
d. Every commission is authorized to enter into contracts with the owner of property adjoining its district on such terms and conditions as such commission may approve, providing for or relating to the treatment and disposal of sewage or industrial wastes of or originating in or on such adjoining property by means of the sewage disposal system or such other facilities as such commission may determine to provide for such purpose, or in such other manner as such contract may provide.