After 11 months leading the institution, Vieira's exit means André Gelfi will serve as Interim President.
The probe focuses on alleged sports betting violations, game outcome manipulation and failure to cooperate with authorities.
The group brings together the Finance, Sport and Justice Ministries.
This represents a 35.2% increase compared to last year's results in the Empire State.
The event will take place 6-9 October at The Venetian Expo in Las Vegas, marking the event's 25th anniversary.
The deal will supply Kalshi with live sports data and analytics on a range of leagues, including soccer, tennis, basketball, ice hockey, baseball, Formula 1 and American football.
The certification extends the Club's record as the first and only operator in Asia to attain this distinction multiple times in succession.
The pre-existing deal will be expanded to include the new BetVision product from Genius Sports.
The show format pits football fans representing specific clubs against teams of football legends and celebrity supporters in quiz-based challenges.
The tool will automate betting slip creation and expand its reach to all active bettors.