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HB4399 • 2026
VEH CD-BIODIESEL USE
This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.
Using official source text because the generated explanation was unavailable or could not be confirmed against the official bill text.
VEH CD-BIODIESEL USE
Rule 19(a) / Re-referred to Rules Committee
Assigned to Transportation: Vehicles & Safety
First Reading
Referred to Rules Committee
Filed with the Clerk by Rep. Eva-Dina Delgado
VEH CD-BIODIESEL USE
Illinois General Assembly - Full Text of HB4399 Select Language × The Illinois General Assembly offers the Google Translate™ service for visitor convenience. In no way should it be considered accurate as to the translation of any content herein. Visitors of the Illinois General Assembly website are encouraged to use other translation services available on the internet. The English language version is always the official and authoritative version of this website. NOTE: To return to the original English language version, select the "Show Original" button on the Google Translate™ menu bar at the top of the window. 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Full Text of HB4399 Home Legislation Full Text HB4399 - 104th General Assembly Bill Status Full Text Votes Witness Slips Select Menu Bill Status Full Text Votes Witness Slips Printer Friendly Version Introduced Printer Friendly Version Introduced Open PDF 104TH GENERAL ASSEMBLY State of Illinois 2025 and 2026 HB4399 Introduced 1/14/2026, by Rep. Eva-Dina Delgado SYNOPSIS AS INTRODUCED: 625 ILCS 5/12-705.1 Amends the Illinois Vehicle Code. Provides that, beginning July 1, 2027, a diesel powered vehicle owned or operated by the State, any county or unit of local government, any school district, any community college or public college or university, or any mass transit agency must use a biodiesel blend that contains 19%, unless the engine is designed or retrofitted to operate on a higher percentage of biodiesel or on ultra low sulfur fuel. Allows, in December, January, February, and March, a biodiesel blend of at least 10% to be used. Effective immediately. LRB104 17513 LNS 30940 b A BILL FOR HB4399 LRB104 17513 LNS 30940 b 1 AN ACT concerning transportation. 2 Be it enacted by the People of the State of Illinois, 3 represented in the General Assembly: 4 Section 5. The Illinois Vehicle Code is amended by 5 changing Section 12-705.1 as follows: 6 (625 ILCS 5/12-705.1) 7 Sec. 12-705.1. Required use of biodiesel by certain 8 vehicles. 9 (a) Beginning July 1, 2006, any diesel powered vehicle 10 owned or operated by this State, any county or unit of local 11 government, any school district, any community college or 12 public college or university, or any mass transit agency must, 13 when refueling at a bulk central fueling facility, use a 14 biodiesel blend that contains 5% biodiesel, as those terms are 15 defined in the Illinois Renewable Fuels Development Program 16 Act, where available, unless the engine is designed or 17 retrofitted to operate on a higher percentage of biodiesel or 18 on ultra low sulfur fuel. 19 (a-1) Beginning July 1, 2027, any diesel powered vehicle 20 owned or operated by this State, any county or unit of local 21 government, any school district, any community college or 22 public college or university, or any mass transit agency must 23 use a biodiesel blend that contains 19%, as those terms are HB4399 - 2 - LRB104 17513 LNS 30940 b 1 defined in the Illinois Renewable Fuels Development Program 2 Act, where available, unless the engine is designed or 3 retrofitted to operate on a higher percentage of biodiesel or 4 on ultra low sulfur fuel. In December, January, February, and 5 March, a biodiesel blend of at least 10% may be used. 6 (b) Nothing in this Section prohibits any unit of 7 government from using a biodiesel blend containing more than 8 2% biodiesel. 9 (c) As used in this Section, a "bulk central fueling 10 facility" means a non-commercial fueling facility whose 11 primary purpose is the fueling of vehicles owned or operated 12 by the State, a county or unit of local government, a school 13 district, a community college or public college or university, 14 or a mass transit agency. 15 (d) The Secretary of Transportation shall adopt rules for 16 implementing this Section. 17 (Source: P.A. 96-281, eff. 8-11-09.) 18 Section 99. Effective date. This Act takes effect upon 19 becoming law. Footer Disclaimer This site is maintained for the Illinois General Assembly by the Legislative Information System, 705 Stratton Building, Springfield, Illinois 62706. 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