TITLE 83: PUBLIC UTILITIES CHAPTER I: ILLINOIS COMMERCE COMMISSION SUBCHAPTER d: GAS UTILITIES PART 501 STANDARDS OF SERVICE FOR GAS UTILITIES AND ALTERNATIVE GAS SUPPLIERS The General Assembly's Illinois Administrative Code database includes only those rulemakings that have been permanently adopted. This menu will point out the Sections on which an emergency rule (valid for a maximum of 150 days, usually until replaced by a permanent rulemaking) exists. The emergency rulemaking is linked through the notation that follows the Section heading in the menu. View Entire Part SUBPART A: GENERAL Section 501.5 Effectiveness of this Part Section 501.10 Definitions and Incorporations by Reference Section 501.20 Application Section 501.30 Exemption or Modification Section 501.40 Complaints Section 501.50 Customer Call Centers SUBPART B: NATURAL GAS MEASUREMENT REQUIREMENTS Section 501.100 Application of Subpart B Section 501.110 Location and Installation of Meters Section 501.120 Meter and Equipment Handling Requirements Section 501.130 Trained Personnel Section 501.140 Compressibility and Supercompressibility Section 501.150 Fixed Factor Delivery Section 501.160 Testing Facilities and Equipment Section 501.170 Meter Accuracy Requirements Section 501.180 Diaphragm Meters Section 501.190 Rotary Meters Section 501.200 Turbine Meters Section 501.210 Orifice Meters Section 501.220 Multi-Path Ultrasonic Meters Section 501.230 Coriolis Meters Section 501.240 Other Meter Types Section 501.250 Sample Testing of Diaphragm Meters Section 501.260 Meter Tests Requested by the Customer Section 501.270 Commission Referee Tests Section 501.280 Meter Tests Requested by Natural Gas Suppliers Section 501.290 Meter Installation Inspection Section 501.300 Correctors Section 501.310 Transmitters Section 501.320 Gas Chromatograph SUBPART C: CUSTOMER INFORMATION Section 501.400 Corrections and Adjustments for Measurement Error Section 501.410 Information to Customers Section 501.420 Meter Reading SUBPART D: GAS SERVICE STANDARDS Section 501.500 Pressure Regulation Section 501.510 Pressure Survey Section 501.520 Interruptions of Service Section 501.530 Heating Value Section 501.540 Good Engineering Practice SUBPART E: EXTENSION OF MAINS Section 501.600 Extension of Distribution Mains in Urban Areas Section 501.610 Extension of Distribution Mains in Rural Areas

AUTHORITY: Implementing and authorized by Sections 8-301, 8-302, 8-501, 9-201, 10-101, 10-107, 19-110(e)(3) and 19-115(b)(1), (b)(4) and (b)(5) of the Public Utilities Act [220 ILCS 5/8-301, 8-302, 8-501, 9-201, 10-101, 10-107, 19-110(e)(3) and 19-115(b)(1), (b)(4) and (b)(5)].

SOURCE: Adopted at 39 Ill. Reg. 12494, effective August 25, 2015; amended at 41 Ill. Reg. 351, effective December 29, 2016.