SAO PAULO — Brazil's Supreme Court began reviewing final motions on Friday seeking clarification of a 2025 ruling that rejected the “time limit” thesis. Justices are considering motions filed by the government, political parties, farmers, and Indigenous organizations, with votes due by Aug. 18.

The court is set to weigh a series of cases in the coming days that could reshape protections for the Amazon rainforest and Indigenous communities. These cases span Indigenous land rights, recent rollbacks on environmental safeguards, and infrastructure projects.

The “time limit” thesis is a legal theory backed by the agribusiness caucus that would restrict Indigenous land claims to territories they occupied or were under legal dispute when the Constitution took effect on Oct. 5, 1988. Ricardo Terena, a lawyer with the Articulation of Indigenous Peoples of Brazil, warned that some proposals linked to these debates could have lasting negative effects. Some of the proposals could effectively stall future demarcations by adding administrative hurdles and broadening compensation rights for non-Indigenous occupants, allowing them to remain on disputed land until payment is made, Terena said.

The Articulation of Indigenous Peoples of Brazil is an indigenous rights organization established in 2005. The impact of these legal theories is visible in ongoing demarcation efforts, such as those for the Kawahiva Indigenous people in Mato Grosso state. Authorities confirmed the presence of the Kawahiva in 1999 and completed the physical demarcation of their territory earlier this month.

On Wednesday, Brazil’s top court is scheduled to consider two other sets of cases: state laws that led to the end of the soy moratorium and a new environmental license law. In January, major grain traders withdrew from the soy moratorium, a nearly 20-year-old pact credited with reducing Amazon deforestation by barring soy grown on cleared land. The agreement collapsed after top soy-producing states passed bills revoking tax benefits for participating companies.

Justice Flávio Dino issued an injunction temporarily halting the state legislation, and the full court is now set to review his order. The expansion of Brazil’s agricultural frontier, particularly for cattle ranching and soybean production, is the country’s leading cause of deforestation. Agribusiness holds a majority in Brazil's Congress and has pushed through measures that weaken environmental protections.

The court is also expected to consider a challenge to the new environmental licensing law that took effect in February. This law fast-tracks permits for projects with significant impact, including mines, highways, and industrial plants. The environment ministry defended the changes in a statement. Brazil needs an environmental licensing system that is more efficient, predictable, technically robust and capable of addressing the challenges of an economy that must expand infrastructure investment while confronting climate change and biodiversity loss, the environment ministry said.

In recent years, a mostly conservative Congress approved measures that environmentalists say violate constitutional rights. President Luiz Inácio Lula da Silva vetoed some measures outright and parts of others. Lawmakers overrode President Lula's objections, and the disputes ultimately reached the Supreme Court.

Suely Araújo, a policy coordinator at the Climate Observatory, commented on the executive branch's position. The government is very weak in the legislative arena, Araújo said. It often opposes anti-environmental bills, but it lacks the political strength to persuade Congress to vote with it.

Why It Matters

The Brazilian Supreme Court's upcoming rulings will determine the future of Amazon protections as agricultural expansion drives deforestation. These cases represent the final arbiter in disputes where a conservative Congress overrode presidential vetoes to weaken environmental safeguards. The decisions will either uphold current land demarcation processes or allow legal theories backed by agribusiness to restrict Indigenous claims and fast-track infrastructure permits.