The package still requires formal approval. The FIA said it would submit the proposed changes to the World Motor Sport Council on June 23 in Macau, and said the approval process would be expedited to give teams and manufacturers time to adapt.
The proposed package changes the balance between the internal combustion engine and the energy recovery system. In Formula One, the internal combustion engine is the fuel-burning part of the power unit, while the energy recovery system captures and deploys electrical energy. Fuel flow is the regulated rate at which fuel energy can be supplied to the engine.
The FIA said the agreed package includes targeted adjustments to internal-combustion-engine output, fuel energy flow and energy-recovery-system deployment, as well as more flexibility in energy management. Formula 1's own report said the package also covers power-unit supply conditions, race operations and relevant financial regulations.
Sky Sports reported that the agreement sets a two-step move away from the 2026 framework's roughly 50:50 split between combustion and electric power. The Guardian reported that the 2027 proposal would move the balance to 58:42, with a fuel-flow increase, before a 60:40 split in 2028.
Formula One power-unit balance under proposed rules. Source: FIA; The Guardian, 2026.