Illinois Administrative Code
Title 83 - PUBLIC UTILITIES
Part 735 - PROCEDURES GOVERNING THE ESTABLISHMENT OF CREDIT, BILLING, DEPOSITS, TERMINATION OF SERVICE AND ISSUANCE OF TELEPHONE DIRECTORIES FOR LOCAL EXCHANGE TELECOMMUNICATIONS CARRIERS IN THE STATE OF ILLINOIS
Section 735.121 - Refunds of Additional Charges

In the event that the Commission orders a telecommunications carrier to refund incorrectly calculated additional charges made pursuant to Section 9-221 or Section 9-222 of the Public Utilities Act, the telecommunications carrier shall pay interest on such refund at the rate established by the Commission to be paid on deposits in 83 Ill. Adm. 735.120(h)(1).