(a) 30 days thereafter;
(b) 30 days after the Commission has convened in respect of the matter most recently referred to it, where proceedings have been consolidated pursuant to Article 2007(6); or
(c) such other period as the consulting Parties may agree,
any consulting Party may request in writing the establishment of an arbitral panel. The requesting Party shall deliver the request to the other Parties and to its Section of the Secretariat.
2. Upon delivery of the request, the Commission shall establish an arbitral panel.
3. A third Party that considers it has a substantial interest in the matter shall be entitled to join as a complaining Party, on delivery of written notice of its intention to participate to the disputing Parties and its Section of the Secretariat. Such notice shall be delivered at the earliest possible time, and in any event no later than seven days after the date of delivery of a request by a Party for the establishment of a panel.
4. If such Party does not join as a complaining Party in accordance with paragraph 3, it normally shall refrain thereafter from initiating or continuing:
(a) a dispute settlement procedure under this Agreement; or
(b) a dispute settlement proceeding in the GATT on grounds that are substantially equivalent to those available to that Party under this Agreement,
regarding the same matter in the absence of a significant change in economic or commercial circumstances.