Article 224 of Code of Civil Procedure

If the creditor does not hold an enforceable instrument or his debt is not of a specified amount, attachment shall be permissible only by an order of the judge of interim matters authorizing attachment and provisionally assessing the attaching creditor's debt, upon a reasoned petition submitted by the applicant for attachment. Before issuing the order, the judge may conduct a summary inquiry if the documents supporting the application are insufficient. In the case mentioned in the preceding Article, the petition must contain a full description of the movables sought to be attached. That, no such authorization is needed if the creditor holds a judgment, even if it is not enforceable, provided that the debt established therein is of a specified amount. If an action concerning the right has already been brought before the competent court, the authorization for attachment referred to in the first paragraph may be requested from the presiding judge of the panel hearing the action.