TITLE 83: PUBLIC UTILITIES
CHAPTER I: ILLINOIS COMMERCE COMMISSION
SUBCHAPTER f: TELEPHONE UTILITIES
PART 727 REQUIREMENTS FOR NON-BUSINESS ENTITIES WITH PRIVATE BUSINESS SWITCH SERVICE TO COMPLY WITH THE EMERGENCY TELEPHONE SYSTEM ACT
SECTION 727.200 GENERAL STANDARDS AND REQUIREMENTS
Section 727.200 General Standards and Requirements
The digits "9-1-1" shall be the primary emergency telephone number within a county or municipality that has received Commission approval of a 9-1-1 system. In areas where Enhanced 9-1-1 is available, a private business switch operator must ensure that its system is capable of meeting the requirements set forth in Section 727.205. Nothing in this Section shall require changes in customary dialing patterns (i.e., using the prefix or access code 9 to obtain an outside line before dialing 9-1-1).