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). If a cost study is requested under paragraphs (1) or (2) of this subsection, then the township shall order and pay for the cost study. If a cost study is requested under paragraphs (3) or (4) of this subsection, then the municipalities whose mayors or presidents requested the cost study under paragraph (3), or the customers who filed a petition under paragraph (4), shall choose the independent entity to conduct the cost study, order the cost study, and pay for 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 residential and commercial connection charges for the waterworks system or sewerage system, whichever applies, in at least 30 units of local government in Illinois with a similar number of customers as are connected to the township's waterworks system and sewerage system. 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.
"Connection charge" means any nominal 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 line in the adjoining utility easement.
"Independent entity" means 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.
60 ILCS 1/205-141