CHAPTER I: ILLINOIS COMMERCE COMMISSION
SUBCHAPTER d: GAS UTILITIES
PART 501 STANDARDS OF SERVICE FOR GAS UTILITIES AND ALTERNATIVE GAS SUPPLIERS
SUBPART A: GENERAL
SUBPART B: NATURAL GAS MEASUREMENT REQUIREMENTS
SUBPART C: CUSTOMER INFORMATION
SUBPART D: GAS SERVICE STANDARDS
SUBPART E: EXTENSION OF MAINS
