TITLE 83: PUBLIC UTILITIES
CHAPTER I: ILLINOIS COMMERCE COMMISSION
SUBCHAPTER c: ELECTRIC UTILITIES
PART 410 STANDARDS OF SERVICE FOR ELECTRIC UTILITIES AND ALTERNATIVE RETAIL ELECTRIC SUPPLIERS
SECTION 410.320 STANDARD FREQUENCY
Section 410.320 Standard Frequency
Each entity that supplies alternating current for use by retail customers in this State shall operate its equipment in a manner that the frequency of the alternating current maintained by the operation of the interconnected transmission systems is not degraded as a result of any action or lack of action on the part of the entity.