House Bill 25-1197 — "Sale of Electrical Assisted Bicycles Requirements" — was sponsored in the House by Rep. Lesley Smith (D) and Rep. Rick Taggart (R) and in the Senate by Sen. Judy Amabile (D) and Sen. Matt Ball (D). It passed the House 46-16-3 on 10 March 2025 and the Senate 23-11 on 15 April 2025, was signed on 28 May 2025 as Chapter 279, and took effect 6 August 2025. The class/speed/wattage labeling and certain seller-disclosure provisions become operative 1 January 2027.
HB 25-1197 does four things:
1. UL 2849 / EN 15194 battery-certification mandate (effective 6 August 2025; labeling provisions effective 1 January 2027)
A person — including manufacturers, distributors, assemblers, refurbishers, and retailers — shall not manufacture, distribute, assemble, recondition, sell, offer to sell, lease, or rent a lithium-ion battery as part of, or intended for use in, an electrical assisted bicycle unless the battery has been certified by an accredited testing laboratory for compliance with UL 2849 or EN 15194 (or an alternative standard approved by the Colorado Division of Fire Prevention and Control). UL 2849 covers the e-bike electrical system as a whole and incorporates UL 2271 cell/pack testing by reference; EN 15194 is the European e-bike standard. The certification requirement is effective with the general bill (6 August 2025); the class/speed/wattage labeling and certain seller-disclosure provisions take effect 1 January 2027.
Enforcement runs through the Colorado Attorney General + district attorneys under the Colorado Consumer Protection Act. Violations are deceptive trade practices subject to civil penalties up to $20,000 per violation under C.R.S. §6-1-112, plus injunctive relief and consumer restitution under §6-1-110.
2. Point-of-sale Class 3 age disclosure
A retailer selling a vehicle capable of operating as a Class 3 e-bike must disclose Colorado's under-16 prohibition at the point of sale. This is the first state-mandated age disclosure on Class 3 sales.
3. Anti-mislabeling deceptive-trade-practice hook
Selling or advertising as an "e-bike" any vehicle that exceeds the three-class system's speed or wattage limits is now an unlawful deceptive trade practice. Out-of-class 28+ mph throttle scooters and "moped-style" sit-down devices marketed as e-bikes fall under CCPA enforcement — same $20,000-per-violation civil penalty.
4. Modified e-bikes lose statutory status
A bike modified so that it no longer meets a class definition — or designed to be easily reconfigured out of class — is excluded from "electrical assisted bicycle" status. Multi-class switchable bikes must comply with every class they can operate in, and must label every class capability (or the highest class) starting 1 January 2027.