Since arbitration is one of the means for settling disputes, such mechanism must have reliable procedures in order to be able to achieve the desired purpose. These procedures depend on the agreement between the contracting parties. In addition, the integrity of the award issued by the arbitral tribunal depends on the integrity of the arbitration procedures starting from the commencement of the arbitral procedures until the issuance of the arbitral award. Among the defenses available for the parties is the defense of the lack of jurisdiction, one of the most important defenses, which can challenge the jurisdiction of the arbitral tribunal. We will discuss such defense in the preliminary part of the study. Furthermore, we note that there is a great interdependence between jurisdiction and invalidity, as one of the reasons for invalidity is the lack of an arbitration agreement, its invalidity, or its expiry, which means that the arbitral tribunal is not authorized to adjudicate the dispute, and the arbitral tribunal's lack of authority to adjudicating issues outside its jurisdiction under the arbitration agreement results in the invalidity of the arbitral award.