65 ILCS 5/11-136-3
Such a commission shall organize by appointing a chairman from its own members and a clerk and treasurer, who need not be commissioners. It shall adopt its own rules of procedure and provide for its meetings. The commission has full and complete supervision, management, and control of the waterworks system, or sources of supply of water, or sewer systems, or combination thereof, as provided in the ordinances or resolutions for acquiring and operating the same, and in their maintenance, operation, and extension. The commission is authorized to contract with the municipalities which established the commission or with any other person, firm or corporation for a supply of water, a sewage treatment plant or any other facilities useful in conducting a water supply and sewage disposal system for a period not exceeding 50 years, and the corporate authorities of those municipalities are authorized to enter into contracts with the commission. The commission is authorized to purchase from any person, firm or corporation or municipal corporation including those making up the commission, any sewer or water properties or sources of supplies and municipalities are hereby authorized to sell such facilities to the commission.
65 ILCS 5/11-136-3