Possibility of direct enforcement of an extrajudicial enforcement instrument containing an arbitration clause. However, in the case of a debtor's petition to challenge execution proceedings, there is a limitation on the matters subject to review by the judiciary. "That [state] court may not decide on issues relating to the instrument or the obligations set forth therein – existence, constitution or extinction of the credit –, for, if the dispute concerns those specific matters, it must be resolved through arbitration":