This Part applies to every public utility, as defined in Section 3-105 of the Act (Ill. Rev. Stat. 1985, ch. 1112/3, par. 3-105), under the jurisdiction of the Commission, and every telecommunications carrier subject to Article IX of the Act (Ill. Rev. Stat. 1985, ch. 1112/3, pars. 9-101 through 9-252).
Ill. Admin. Code tit. 83, § 330.20