The FIA has confirmed a series of regulatory changes following a recent World Motor Sport Council meeting, with several taking effect straight away.
Among the most significant decisions approved is the confirmation of planned shifts in the balance between internal combustion engines and batteries for 2027 and 2028.
F1 teams had initially reached an agreement on these power unit modifications on June 10, but the proposals have now received formal approval from the World Motor Sport Council.
The green light clears the path for sweeping technical changes that have been highly anticipated by drivers, including Max Verstappen.
Beyond the power unit regulations, the FIA has also introduced important updates to the technical rulebook concerning extreme weather conditions.
The governing body now permits a separate Heat Hazard declaration for both a sprint race and a grand prix, rather than applying a single measure across an entire race weekend.
Previously, a Heat Hazard designation would cover a full race weekend, but the updated rule gives organisers far greater flexibility to respond to changing conditions.
A Heat Hazard is declared when temperatures exceed 31 degrees Celsius, making the new protocol potentially relevant as soon as this weekend’s Austrian Grand Prix in Spielberg.
The updated regulations take effect immediately, meaning teams and organisers at the Red Bull Ring must already be preparing to operate under the new framework.
The World Motor Sport Council also approved a notable change to pre-season testing, extending the winter test week from three days to four days ahead of future campaigns.
The additional test day reflects the growing complexity of modern Formula 1 cars, giving teams more time to properly evaluate and fine-tune machinery before the season begins.
With the 2026 season already well underway, the expanded testing format will be a welcome adjustment for engineers navigating increasingly sophisticated technical regulations heading into the new era.