Some foreign investors doing business in Brazil through Brazilian subsidiaries (therefore, purely domestic transactions for purposes of Brazilian law) insist in inserting arbitral clauses providing for ICC arbitration. This is possible under ICC Rules of Arbitration. But while some believe that the party autonomy provided for Section 2 of the Brazilian Arbitration Act allows a party to a purely domestic transaction to elect any given law or lex mercatoria as the contract's governing law, the majority of scholars and arbitration practitioners believe otherwise.
Purely domestic disputes submitted to arbitration must (i) have Brazilian law as the governing law and (ii) establish a Brazilian city as the seat of arbitration. Foreign investors must avoid anything different than that in their arbitration clauses, unless the contract is —in fact— an international contract.