The FIA World Motor Sport Council has ratified Formula 1 power unit rule changes for 2027 along with safety adjustments for the 2026 season.
The council approved a shift to a 58-42 split between combustion power and electric energy starting in 2027. This moves toward a 60-40 split by 2028.
Safety measures for 2026 include a partial return of Boost Mode in wet conditions, limited to maintaining power without increases. The Heat Hazard declaration can now apply separately to sprint and main races.
Pre-season testing in 2027 will extend to four days due to car complexity. FIA President Mohammed Ben Sulayem said the organization will continue working with stakeholders on regulations.
The changes follow discussions among F1 teams and aim to address driver feedback while maintaining safety.
