Allegation of nullity of the arbitration clause on the grounds that: (i) the franchise agreement is null and void, (ii) it violates "contractual balance," (iii) the appellant is in a position of economic vulnerability, having entered into bankruptcy proceedings and being unable to bear the costs of the arbitration proceedings, and (iv) the matter involves a consumer relationship. No consumer relationship established. Even where there is economic vulnerability on the part of the party that executed the adhesion contract, provided the requirements of Article 4, §2, of the Brazilian Arbitration Act are met, the arbitration clause is enforceable: