Brazil's Federal Supreme Court will resume a judgment Wednesday to define rules for a special election to fill the Rio de Janeiro governorship [1].

The decision is critical because it determines how the state will select a leader for the "buffer mandate," a temporary term that extends until January 2027 [2]. The vacancy in the governor's office has left the state under the administration of interim governor Ricardo Couto.

Justice Edson Fachin, president of the Supremo Tribunal Federal, scheduled the proceedings for Aug. 19 [1]. The court must resolve the legal framework for the election process to ensure a legitimate transition of power before the next regular term begins [2].

"Marcamos para 19 de agosto a retomada do julgamento," Fachin said [1].

The legal dispute centers on the specific requirements and timing for the vote. While some reports previously indicated a different timeline for the return of in-person sessions, the court has solidified the Aug. 19 date for this specific case [1], [3].

The outcome will dictate whether the state holds a direct popular vote or follows an alternative legal mechanism to fill the vacancy [2]. This process is necessary to provide stability to the Rio de Janeiro government during the remaining months of the current cycle [2].

Teo Cury said the STF will decide how the election for the buffer mandate in Rio de Janeiro will be conducted [4].

"Marcamos para 19 de agosto a retomada do julgamento."

The STF's ruling will resolve a period of administrative uncertainty in one of Brazil's most populous states. By defining the rules for the buffer mandate, the court prevents a prolonged power vacuum and establishes the legal precedent for how interim vacancies are handled when they overlap with upcoming general election cycles.