220 ILCS 45/5

This Act and any rules adopted pursuant to this Act shall be applicable to such switching facilities of telecommunications carriers in Illinois, as defined in Section 13-202 of The Public Utilities Act, and to such switching facilities of any company described in Section 1 of "An Act relating to the powers, duties and property of telephone companies", approved May 16, 1903, as the agencies find are necessary to protect against a major interruption of telecommunications services.