On December 29, 2017, the Illinois Appellate Court issued a ruling reversing the decision of the Illinois Independent Tax Tribunal (Tribunal) in Waste Management of Ill., Inc. v. Ill. Independent Tax Tribunal, 2017 IL App (1st) 162830-U. This is the second appellate court to consider a Tax Tribunal ruling, and the first to overturn a decision of the Tribunal. The appellate court overturned the Tribunal’s grant of summary judgment in favor of the Illinois Department of Revenue (Department) and held that for the time periods at issue, the Motor Fuel Tax Law (Tax) (35 ILCS 505/1 et seq.) did not impose tax on compressed natural gas (CNG). In this case, Waste Management filed monthly returns reporting and paying the Tax on its usage of CNG. Following an amendment to a Department regulation that explicitly provided that CNG was subject to the Tax (see 86 Ill. Admin. Code § 500.200(c)), Waste Management amended its returns and sought a refund of Tax paid on CNG-powered vehicles for time periods prior to the amendment. The Department denied the refund claims, and Waste Management appealed the Department’s denial to the Tribunal. On the parties’ cross motions for summary judgement, the Tribunal found in the Department’s favor, on the basis that CNG was a taxable “motor fuel” under the Tax statutes. A copy of the Tribunal’s Order (Order) is linked here. (more…)