Illinois · House Bill 4124 · 104th General Assembly

UNCAP AFFORDABLE POWER ACT

HB 4124 Sponsored by Brad Halbrook In committee

  1. Introduced Sep 16, 2025
  2. In committee Oct 15, 2025
  3. Passed the House Next
  4. Passed the Senate  
  5. To the governor  
  6. Became law  

What it does

The legislature's own summary of the bill, or its official long title.

Specifies that the amendatory Act may be referred to as the Uncap Affordable Power Act. Amends the Illinois Power Agency Act, the Public Utilities Act, and the Environmental Protection Act. Provides, in each of those Acts, that it is the policy of the State not to regulate carbon dioxide emissions that arise from the combustion of fossil fuels for the purpose of generating electrical power. Provides that, beginning…

Read the full title (158 words)

Specifies that the amendatory Act may be referred to as the Uncap Affordable Power Act. Amends the Illinois Power Agency Act, the Public Utilities Act, and the Environmental Protection Act. Provides, in each of those Acts, that it is the policy of the State not to regulate carbon dioxide emissions that arise from the combustion of fossil fuels for the purpose of generating electrical power. Provides that, beginning on the effective date of the amendatory Act, the Illinois Power Agency, the Illinois Commerce Commission, and the Illinois Environmental Protection Agency shall not regulate carbon dioxide emissions that arise from the combustion of fossil fuels for the purpose of generating electrical power. Removes carbon dioxide from the list of regulated greenhouse gases in the Environmental Protection Act. Repeals from the Environmental Protection Act a provision that provides for the regulation of greenhouse gas emissions from electric generating units and large greenhouse gas-emitting units. Makes other conforming changes. Effective immediately.

Every action

8 steps, oldest first, as the legislature records them.

  1. HouseFiled with the Clerk by Rep. Brad Halbrook
  2. HouseAdded Co-Sponsor Rep. Travis Weaver
  3. HouseAdded Co-Sponsor Rep. Adam M. Niemerg
  4. HouseAdded Co-Sponsor Rep. Jason R. Bunting
  5. HouseAdded Co-Sponsor Rep. Jed Davis
  6. HouseAdded Co-Sponsor Rep. David Friess
  7. HouseFirst Reading
  8. CommitteeReferred to Rules Committee · House Rules

Roll calls

No recorded votes on this bill yet.

Sponsors

The member who introduced it, joined by 5 cosponsors: 5 Republicans.

All 5 cosponsors

From Illinois's official records (www.ilga.gov), checked Nov 13, 2026. Text links go to the official versions; LegiList does not copy bill text.