For the purposes of this Part:
"Act" means the Public Utilities Act [220 ILCS 5/];
"Department" means the Illinois Department of Revenue;
"Electric utility" shall have the meaning set forth in Section 16-102 of the Public Utilities Act [220 ILCS 5/16-102] ; and
"Retail customer" shall have the meaning set forth in Section 16-102 of the Public Utilities Act.
Ill. Admin. Code tit. 86, § 518.100