Brazil's civil aviation authority ANAC has launched a public consultation on sustainable aviation fuel (SAF), following the issuance of the regulatory decree that anchors the country's SAF framework. The move marks the first formal opportunity for airlines, fuel producers and industry stakeholders to shape how the mandate will be implemented in one of the world's largest domestic aviation markets.

The consultation follows the decree already signed into effect, meaning Brazil now has both a top-level legal instrument and an open regulatory process running in parallel. Law firm Mayer Brown flagged the development, noting that the consultation gives affected parties a window to comment on the rules that will govern SAF supply and compliance.

What does the consultation cover?

Public consultations at ANAC typically invite comments from airlines, airports, fuel suppliers and other stakeholders before final rules are published. In this case, the regulator is seeking input on the implementation of the decree governing SAF — the fuel type produced from renewable or waste feedstocks that can be blended with conventional jet fuel.

For Brazilian carriers, the outcome will determine:

• How SAF volumes are mandated or phased in
• What compliance and reporting obligations apply
• How the rules interact with existing fuel supply infrastructure

Why Brazil's SAF framework matters

Brazil counts among the world's largest domestic aviation markets by traffic, and its airlines face the same decarbonization pressure as North American and European operators. SAF remains the principal near-term lever for reducing aviation emissions, because airframes and engine technology cannot deliver equivalent cuts on current timelines.

The decree and subsequent consultation position Brazil alongside jurisdictions including the European Union and the United Kingdom, which have already legislated SAF blending mandates with defined phase-in schedules. The Brazilian process is still at the rulemaking stage: the decree establishes the framework, while ANAC's consultation will inform the implementing rules that follow.

What happens next?

Stakeholders now have the chance to submit responses before ANAC finalizes the regulatory text. The substance of those submissions — and how far the final rules diverge from the decree's framework — will determine the compliance cost and fuel-supply implications for Brazilian operators.

Until ANAC closes the consultation and publishes its rules, the binding requirements for SAF use in Brazil remain limited to what the decree itself establishes.