Proposal to amend UN Global Technical Regulation No. 20 on electric vehicle safety, focusing on thermal propagation triggered by single-cell thermal runaway. The amendment introduces two compliance paths: a physical test approach with five initiation methods (external heater, internal heaters, nail penetration, laser-based initiation) performed at vehicle or component level; and a risk management approach requiring manufacturers to document known risks and mitigation strategies. Vehicles must provide advance warning 5 minutes before hazardous conditions (fire, explosion, smoke) occur in the passenger compartment. Phase 2 discussions concluded that water immersion tests, long-term fire resistance tests, REESS rotation tests, vibration profile modifications, AC/DC charging protections, and heavy-duty overcurrent tests do not require regulatory inclusion based on available field evidence and safety analysis.

• GTR No. 20 Electric Vehicle Safety