Ill. Admin. Code tit. 83, § 1329.405
a) Vendors shall submit monthly invoices for network costs that include the same level of detail as that included in invoices provided to 9-1-1 Authorities prior to January 1, 2016, and are in sufficient detail to permit the Department and the 9‑1‑1 Authority to determine that the costs billed are in fact "network costs" as defined in Section 1329.110. The Department or 9-1-1 Authority may request additional invoice information from vendors. Invoices shall be submitted to:
Illinois State Police
9-1-1 Administrative Support Command
9-1-1 Network Costs
801 South 7th Street
Springfield IL 62703
Email: 911_Admin_Support@isp.state.il.us
e) Monthly Invoice Reconciliation
1) Within 30 days after the date the vendor invoice is received by the Department, each 9-1-1 Authority shall:
3) If the Department disputes any portion of an invoice on the grounds that it includes amounts that do not qualify as network costs or are otherwise ineligible for reimbursement from the Fund under ETSA Section 30, the Department will provide a written notice to the Advisory Board vendor and 9-1-1 Authority of that dispute, which shall identify in detail the basis for the dispute, the account number under which the invoice has been rendered, the date of the bill, and the specific items on the invoice being disputed.
6) Costs that the Administrator determines are not network costs or are otherwise ineligible for reimbursement under ETSA Section 30:
The Department shall pay network costs incurred by 9-1-1 Authorities.