HB 6278 Connecticut House · 2025 Regular Session

AN ACT CONCERNING THE USE OF ALTERNATIVES TO ANIMAL TESTING METHODS AND REQUIRING THE USE OF BIODIESEL BLENDING METHODS FOR CERTAIN DIESEL FUELS.

HB 6278 requires manufacturers and contract testing facilities to use scientifically validated alternatives to animal testing (such as computer models or cell-based methods) when available, starting October 1, 2025, with exceptions for certain medical research. It also mandates phased biodiesel blending in retail diesel fuel: 5% by July 2025, 10% by July 2027, and 20% by July 2029 during April-November. State fleet vehicles must meet 5% biodiesel by July 2025 and 20% by July 2027 during the same months. The bill directly affects chemical manufacturers, testing facilities, and diesel fuel sellers across Connecticut.

Issues: ✓ Energy ✓ Environment

Bill status in committee 1 of 4 stages cleared

Introduction

Jan 2025

Committee Review

Floor Vote

Governor

Introduced Jan 23, 2025 Last action Apr 16, 2025

Maddy AI version diff · 1 comparison

What changed between versions

Proposed Bill → Committee Bill · 6 edits

MODERATE

The bill was amended to add a requirement for biodiesel blending in diesel fuels sold in the state during warmer months, while also adding co-sponsors and updating the LCO number. The original animal testing provision remains but is now just one section of a broader bill. This matters because it expands the legislation's scope beyond just animal testing to include environmental fuel standards.

Scope change

The bill's scope expanded from solely addressing animal testing methods to also include biodiesel blending requirements for diesel fuels.

REQUIREMENT

Added new Section 2 requiring diesel fuel sold at retail to contain 5% biodiesel by July 2025, 10% by July 2027, and 20% by July 2029 during April-November

Added specific biodiesel blending requirements for state fleet vehicles, vessels, and construction equipment

ELIGIBILITY

Added four new co-sponsors to the bill

DEFINITION

Added comprehensive definitions for terms like 'alternative test method', 'animal', 'animal testing facility', 'contract testing facility', 'manufacturer', and 'validation body'

TIMELINE

Added effective dates for the new biodiesel requirements and animal testing provisions

TECHNICAL

Changed document header from Proposed Bill to Committee Bill with updated LCO number from 2712 to 6098

Floor votes

How they voted

No floor votes recorded yet.

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Mar 28, 2025

Lower · Passed

Joint Favorable

lower

Mar 17, 2025

Committee

REF. TO JOINT COMM. ON Environment

lower

Mar 14, 2025

Lower · Passed

DRAFTED BY COMMITTEE

lower

Jan 23, 2025

Committee

REF. TO JOINT COMM. ON Environment

lower

10 primary · 0 co-sponsors