Ill. Admin. Code tit. 86, § 475.130
b) Withholding of Tax by Purchasers
2) The first purchaser is required to withhold and remit the tax imposed by the Tax Act to the Department from the oil and gas purchased from the production unit unless the first purchaser obtains from the operator an exemption certificate signed by the operator stating that the production unit is not subject to the tax imposed by the Tax Act.
A) Wells Drilled Prior to July 1, 2013
i) For production units containing wells drilled prior to July 1, 2013 and from which the first purchaser commences purchasing oil or gas on or after January 1, 2019, the exemption certificate must include the following information:
• name and address of the operator;
• common name of the production unit and the number assigned to the production unit by the prior first purchaser;
• a statement by the operator that he or she will promptly notify the first purchaser in the event that the well becomes subject to the tax imposed by the Tax Act; and
• a statement by the operator that the production unit is exempt from the tax imposed by the Tax Act.
i) name and address of the operator;
iv) legal description of the production unit;
7) If a purchaser purchases oil or gas from an operator or person claiming to be acting as a purchaser for purposes of the Tax Act, or the operator or person requests payment for 100% of the value of the oil or gas without withholding the tax imposed by the Tax Act, the purchaser shall obtain a written withholding certification from the operator or person for each well or production unit from which oil or gas is removed, subject to the tax imposed by the Tax Act.
i) name and address of the operator or person;
iv) legal description of the production unit;
c) Withholding of Tax by Operators