Salvo that the parts have expressly limited the its efficacy A determined controversies, they must be considered referred to to cognition arbitral, in virtue of the clause, all the disputes which they find their matrix in the contract, therefore all all the controversies relative to existence, to validity, to the anger, to the termination, execution of the contract, even if insort in time subsequent to exhaustion of the ratio contractual between the parts as long as relative a situations with this constituted.