The central axis of the new regulations remains the basic principle of arbitration upholding the autonomy of the parties, which is already excluded from article 1 of the Act where its purpose is defined and pervades all the provisions.The most important of the new provisions are those concerning the expansion of the arbitrability of disputes, the validity of the arbitration agreement, the proceedings of multilateral arbitrations, as well as the upgrading of the framework of the interim measures issued by the arbitration court and the annulment action against arbitral decisions.