Writ of mandamus. Prohibition on the use of the expressions "tribunal" and "arbitral judge." Although the use of the expression "Court of Justice" to name the arbitration tribunal is unacceptable, the prohibition on the use of the expression "tribunal" by institutions responsible for arbitration is unlawful, since the Brazilian Arbitration Act uses the expression "arbitral tribunal." Likewise, the use of the expression "arbitral judge" is commonly employed by such institutions and accepted by the judiciary: