Article 170Initiation of the arbitration procedure
1.Without prejudice to Article 160, if no mutually agreed solution has been reached within 3 months after a written notice has been provided to the Joint Committee in accordance with Article 169(1), the Union or the United Kingdom may request the establishment of an arbitration panel. Such request shall be made in writing to the other party and to the International Bureau of the Permanent Court of Arbitration. The request shall identify the subject matter of the dispute to be brought before the arbitration panel and a summary of the legal arguments in support of the request.
2.The Union and the United Kingdom may agree that the establishment of an arbitration panel may be requested before the expiry of the time limit laid down in paragraph 1.