Ill. Admin. Code tit. 14, § 120.130 – Eligibility

a) A taxpayer with a credit for a project that meets the qualifications under paragraphs (1), (2), and (4) of subsection (c) of Section 110-20 [35 ILCS 45/110-95], subject to an agreement under the Act, may be certified by the Department to receive an exemption from:
1. 1) the tax imposed at the project site by Section 2-4 of the Electricity Excise Tax Law, and/or
2. 2) any additional charges added to the taxpayer's utility bills at the project site as a pass-on of State utility taxes under Section 9-222 of the Public Utilities Act. [35 ILCS 45/110-95]
b) To receive a certification for the utility tax exemption, the taxpayer must be registered to self-assess that tax.