Active aero and Overtake are two different 2026 systems.
Published
The 2026 rules define FIA Standard ECU-controlled front- and rear-wing modes for designated straights, while a separate electrical “Overtake” function gives an eligible following car a different ERS-K deployment curve. The season also introduces a revised hybrid power unit, Advanced Sustainable fuel requirements, a 3,400mm maximum wheelbase and qualifying written for a 22-car field.
Under the FIA 2026 Formula 1 Regulations, Section B (Sporting), Issue 08, and Section C (Technical), Issue 20, both published 5 August 2026, Driver Adjustable Bodywork may be used only when the car's control electronics says it is enabled and only in FIA-defined activation zones. In a Race or Sprint, Overtake is available to a driver whose car was inside the event's “Detection Gap” at the Detection Line; it becomes available at the Activation Line. The FIA sets that gap and those lines for each Competition, so “within one second” is not a universal 2026 rule.
Scope and version
The FIA World Championship rules control
This page covers the 2026 FIA Formula One World Championship, not Formula 2, Formula E or a national single-seater code. Section B governs session procedure and use of the systems; Section C governs the car, power unit, fuel and permitted hardware. Event-specific FIA information can change activation zones, the Detection Gap, energy limits and safety availability within the framework of those published regulations.
The August issues supersede the June versions previously cited on this page. The public FIA regulation hub should be checked for a later issue before applying this explanation after 26 August 2026.
The central distinction
Wing incidence and Overtake energy deployment are separate
They can be available on the same straight, but their triggers and effects are not the same.
Corner Mode
The baseline wing position
Section B7.1 treats the bodywork as deactivated when the adjustable front-wing profiles and rear-wing flap are both in their Corner Mode positions.
Straight Mode
Full activation reduces incidence
Full activation puts both the front-wing profiles and rear-wing flap into their fixed Straight Mode positions. Section C3.11.6 requires the rear flap's Straight Mode to have lower incidence than Corner Mode.
Overtake
A separate ERS-K permission
Overtake changes the permitted electrical deployment curve. Section C5.2.8 allows ERS-K deployment to remain available to a higher speed when Overtake is active, subject to Section B7.2 and the event limits.
Driver Adjustable Bodywork
All drivers can use the aero mode when the FIA enables it
Section B7.1 does not impose a following-car gap test on Driver Adjustable Bodywork. The FIA defines the full-activation zones for each circuit and supplies them to competitors at least four weeks before the Competition. The driver may activate only after receiving the enabled signal through the control electronics.
In Low Grip Conditions, full activation is not allowed. Only partial activation may be used in the associated Low Grip Activation Zones: the front-wing profiles move to Straight Mode while the rear-wing flap stays in Corner Mode. This is why a broadcast graphic showing wing mode is not, by itself, proof that a driver has received the overtaking energy benefit.
Overtake eligibility
Practice and qualifying differ from the Race and Sprint
The FIA calls practice, Sprint Qualifying and Qualifying Lap Time Classified Sessions (LTCS). In those sessions, Overtake is activated whenever it is enabled and the driver may use it without a following-car test.
The Race and Sprint are Total Time Classified Sessions (TTCS). There, Section B7.2.3 activates Overtake at the Activation Line only if the car was less than the event-specific Detection Gap behind another car at the Detection Line. The published rule does not fix that gap at one second; Section B7.2.1 requires the FIA to provide its value for the Competition.
Decision path
Is the 2026 Overtake function legal and available?
Name the session. In an LTCS, Overtake is activated whenever enabled. In a Race or Sprint, continue through the gap test.
Check the FIA status. The control electronics must notify the driver that Overtake is enabled.
Freeze the Detection Line crossing. In a Race or Sprint, was the car less than the Competition's Detection Gap behind another car?
Wait for the Activation Line. Passing the gap test does not permit use before that line.
Check safety overrides. Overtake is disabled in Low Grip Conditions, during a Safety Car deployment and whenever the Race Director disables it for safety.
Separate permission from performance. Eligibility changes the legal ERS-K power curve; available Energy Store charge and the team's legal energy strategy still affect the result.
Restarts and failures
The gap test does not override race control
Before the start or resumption of a Race or Sprint, Overtake is disabled. It is enabled after the leader first crosses the Detection Line. When the Safety Car is deployed it is disabled again, and it returns only after every car has crossed the Line following the Safety Car's return to the pit lane. The Race Director may disable and later re-enable it at any time for safety.
If the electronic notification system fails, Section B7.2.4 allows a competitor to ask the Race Director for permission to operate manually. Permission is not automatic, and the team then carries the responsibility for using Overtake only when enabled and only after satisfying the gap test.
Car and power unit
The numbers that define the 2026 formula
These are current compliance figures, not early launch targets.
Power unit · C5
1.6-litre V6 plus ERS-K
The engine remains a 1,600cc, six-cylinder, 90-degree V. Section C5.2.1 permits only the engine and ERS-K to propel the car or recharge energy; the former MGU-H is not part of the 2026 system.
Electrical power · C5.2
350kW absolute ERS-K limit
The absolute electrical DC power of the ERS-K may not exceed 350kW. The lower speed-dependent deployment curves, recharge limits and event adjustments determine how much of that capability is usable at a particular point.
Dimensions · C2.3.3
3,400mm maximum wheelbase
The distance between the front- and rear-wheel reference planes may not exceed 3,400mm at the regulation's Legality Setup. “Smaller car” is therefore a dimensional rule, not a guarantee that every design has identical proportions.
Minimum mass
There is no single context-free 2026 weight figure
Section C4.1 defines Minimum Mass as 726kg plus Nominal Tyre Mass in Sprint Qualifying and Qualifying, and 724kg plus Nominal Tyre Mass in all other sessions. Nominal Tyre Mass is the tyre supplier's measured mean for a set of new production dry tyres. The legal test is this formula, not an older promotional headline number.
A declared Heat Hazard changes the calculation. Under Section B1.5.10 it may be declared when the Official Weather Service predicts a Heat Index above 31.0°C during the Sprint or Race, or at the Race Director's sole discretion. For a Race or Sprint covered by the declaration, Section C4.6 applies a 5kg Heat Hazard Mass Increase. At a Competition where a Heat Hazard has been declared for any session, other sessions not covered by that declaration carry a 2kg increase and the driver cooling system must weigh at least 2kg.
Advanced Sustainable fuel
“100% sustainable fuel” is useful shorthand, not the full legal test
Section C16 requires the fuel to use Advanced Sustainable components and refinery streams that are certified, segregated from non-sustainable material and assessed for greenhouse-gas savings against fossil-derived gasoline. The final blend is subject to FIA approval and traceability checks.
There is a narrow exception: Article C16.3.5 permits an additive and denaturant package from non-sustainable sources up to a combined 1.0% by mass. A careful rules explanation should therefore use the FIA term Advanced Sustainable fuel and acknowledge the specified additive exception rather than treating the marketing phrase as the entire composition rule.
Mid-season clarification
The compression-ratio check changed on 1 June 2026
After pre-season testing, the FIA approved a revised compliance method. Section C5.4.3 now caps geometric compression ratio at 16.0 and, from 1 June through 31 December 2026, requires compliance both at ambient temperature and with the engine at 130°C. It also prohibits a design that raises the operating compression ratio above 16.0. This is a current rule-book requirement, not merely a February announcement.
Qualifying with 22 cars
Six are eliminated in Q1 and six in Q2
Section B2.4 sets Q1 at 18 minutes, Q2 at 15 and Q3 at 13. With 22 cars eligible, the slowest six leave after Q1, another six leave after Q2, and ten contest Q3. Sprint Qualifying uses 12-, 10- and 8-minute periods with the same six/six/ten split.
This count is conditional, not universal: the regulation says five cars are eliminated per opening period if 20 are eligible and seven if 24 are eligible. The Sprint remains separate from the Grand Prix; Sprint Qualifying sets the Sprint grid, while Qualifying sets the Race grid.
Worked rulings
Applying the current FIA rules
These are illustrative situations, not purported FIA casebook decisions or real incidents.
Case 1 · defending car
Both cars select Straight Mode
Situation: two cars enter an FIA activation zone when Low Grip Conditions do not apply, but the leading car is not within any following-car gap.
FIA 2026 ruling: both may fully activate Driver Adjustable Bodywork if their control electronics says it is enabled. The aero mode has no proximity test. Only the separate Overtake function uses the Race/Sprint Detection Gap.
Case 2 · Safety Car
A close follower cannot use Overtake yet
Situation: a car is inside the Detection Gap as the Safety Car enters the pit lane.
FIA 2026 ruling: proximity alone is insufficient. Overtake remains disabled until every car has crossed the Line after the Safety Car returned to the pit lane, and the normal activation conditions must then be met.
Case 3 · Q1
The driver in 17th is eliminated
Situation: all 22 eligible cars set valid times and a driver is 17th when Q1 ends.
FIA 2026 ruling: the driver is among the slowest six and takes no further part. Sixteen continue to Q2. If only 20 cars were eligible, the cut would instead remove five.
Common misconceptions
Five shortcuts that give the wrong answer
“Active aero is the new DRS.” The wing mode and Overtake energy permission are separate systems.
“Only the following car changes wing mode.” Driver Adjustable Bodywork itself has no following-gap test.
“The Overtake gap is always one second.” The FIA supplies the Detection Gap for each Competition.
“The 2026 car has one fixed minimum-weight number.” Section C4 uses session-specific base figures plus Nominal Tyre Mass and any Heat Hazard increase.
“Sustainable fuel means the rules allow no non-sustainable ingredient.” Article C16.3.5 contains a limited additive-and-denaturant exception.
Competition-specific controls
What must be checked for each Grand Prix
The full and Low Grip activation zones for Driver Adjustable Bodywork.
The Overtake Detection Gap, Detection Line and Activation Line.
Any circuit-specific ERS-K power or recharge limits issued under Section B7.2.
Whether Low Grip Conditions, a Safety Car period or a Race Director safety decision has disabled Overtake.
Whether a Heat Hazard has been declared for the Sprint, Race or both.
The public regulation establishes the framework, but those event values and official messages decide the live ruling.
Checked on 26 August 2026 against the FIA's then-current public Sporting Issue 08 and Technical Issue 20. Competition-specific FIA information and Race Director messages supplement the published baseline for activation zones, energy limits, safety status and Heat Hazard declarations.
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