(35 ILCS 1010/1-70)
    Sec. 1-70. Decisions.
    (a) The Tax Tribunal shall render its decision in writing, including in that writing a concise statement of the facts found and the conclusions of law reached. The Tax Tribunal's decision shall, subject to law, grant such relief, invoke such remedies, and issue such orders as it deems appropriate to carry out its decisions. The Tax Tribunal shall promptly mail a notice of its decision to the taxpayer and to the Department.
    (b) The Tax Tribunal shall render its decision no later than 90 days after submission of the last brief filed subsequent to completion of the hearing or, if briefs are not submitted, then no later than 90 days after completion of the hearing. The Tax Tribunal may extend the 90 day period, for good cause, up to 30 additional days.
    (c) If the Tax Tribunal fails to render a decision within the prescribed period, either party may institute a proceeding in the circuit court to compel issuance of a decision.
    (d) The Tax Tribunal's decision shall finally decide the matters in controversy, unless any party to the matter timely appeals the decision as provided in Section 1-75 of this Act.
    (e) A decision of the Tax Tribunal shall become final 35 days after the issuance of a notice of decision.
(Source: P.A. 97-1129, eff. 8-28-12.)