The cost study shall be conducted by an independent entity within 6 months of action taken under paragraphs (1), (2), (3), or (4) of this subsection (d). For purposes of subsections (d) and (e), the term "independent entity" shall mean an engineering firm that has not entered into a contract with any State agency, unit of local government, or non-governmental entity for goods or services within the township or township service area in the 24 months prior to being contracted to perform the cost study. After performing a cost study under this subsection (d), an independent entity may not contract with any State agency, unit of local government, or non-governmental entity for goods or services within the township or township service area in the 24 months after completion of the cost study other than to perform further cost studies under this subsection (d). A township shall not be required to conduct more than one cost study in a 60 month period under paragraphs (3) or (4) of this subsection (d). The cost study must include, at a minimum, an examination of similar water main and sewer connection charges in neighboring units of local government or units of local government similar in size or population. Following the completion of the cost study, no increase or new connection charge may be imposed unless the increase or new charge is justified by the cost study. If the connection charge the township charged prior to completion of the cost study is higher than is justified by the cost study, the township shall reduce its connection charge to the amount justified by the cost study. For purposes of this subsection (d), "connection charge" means any charge or fee, by whatever name, assessed to recover the cost of connecting the customer's water main, sewer, or water main and sewer service line to the township's facilities, and includes only the direct and indirect costs of physically tying the service line into the township's main.
Payments required under either paragraph (1) or (2) of this subsection (e) shall be made to the township clerk, who shall forward the same to the independent entity upon receipt of entire amount of the written quote for the cost study. If the entire amount of the written quote for the cost study has not been received within 90 days from the township clerk providing public note of the amount of the written quote, then those amounts received by the township clerk shall be refunded to the persons or entities which paid them.
60 ILCS 1/205-140