US lawIllinoisRegulationsTitle 83 — PUBLIC UTILITIESCHAPTER I: ILLINOIS COMMERCE COMMISSIONSUBCHAPTER f: TELEPHONE UTILITIESPart 730 — STANDARDS OF SERVICE FOR LOCAL EXCHANGE TELECOMMUNICATIONS CARRIERSSubpart D730.41083 Ill. Adm. Code 730.410Call Data Reading IntervalYear: 2026Length: 22 wordsOfficial source Section 730 Section 730.410 Call Data Reading Interval Call data shall be read at intervals to correspond to the customer billing period.Previous83 Ill. Adm. Code 730.405Next83 Ill. Adm. Code 730.415