Chapter VII
Interpretation, Revision and Annulment of the Award

Rule 50
The Application

(1) An application for the interpretation, revision or annulment of an award shall be addressed in writing to the Secretary-General and shall:

(a) identify the award to which it relates;

(b) indicate the date of the application;

(c) state in detail:

(i) in an application for interpretation, the precise points in dispute;

(ii) in an application for revision, pursuant to Article 51(1) of the Convention, the change sought in the award, the discovery of some fact of such a nature as decisively to affect the award, and evidence that when the award was rendered that fact was unknown to the Tribunal and to the applicant, and that the applicant's ignorance of that fact was not due to negligence;

(iii) in an application for annulment, pursuant to Article 52(1) of the Convention, the grounds on which it is based. These grounds are limited to the following:

– that the Tribunal was not properly constituted;
– that the Tribunal has manifestly exceeded its powers;
– that there was corruption on the part of a member of the Tribunal;
– that there has been a serious departure from a fundamental rule of procedure;
– that the award has failed to state the reasons on which it is based;

(d) be accompanied by the payment of a fee for lodging the application.

(2) Without prejudice to the provisions of paragraph (3), upon receiving an application and the lodging fee, the Secretary-General shall forthwith:

(a) register the application;

(b) notify the parties of the registration; and

(c) transmit to the other party a copy of the application and of any accompanying documentation.

(3) The Secretary-General shall refuse to register an application for:

(a) revision, if, in accordance with Article 51(2) of the Convention, it is not made within 90 days after the discovery of the new fact and in any event within three years after the date on which the award was rendered (or any subsequent decision or correction);

(b) annulment, if, in accordance with Article 52(2) of the Convention, it is not made:

(i) within 120 days after the date on which the award was rendered (or any subsequent decision or correction) if the application is based on any of the following grounds:

– the Tribunal was not properly constituted;
– the Tribunal has manifestly exceeded its powers;
– there has been a serious departure from a fundamental rule of procedure;
– the award has failed to state the reasons on which it is based;

(ii) in the case of corruption on the part of a member of the Tribunal, within 120 days after discovery thereof, and in any event within three years after the date on which the award was rendered (or any subsequent decision or correction).

(4) If the Secretary-General refuses to register an application for revision, or annulment, he shall forthwith notify the requesting party of his refusal.

Rule 51
Interpretation or Revision: Further Procedures

(1) Upon registration of an application for the interpretation or revision of an award, the Secretary-General shall forthwith:

(a) transmit to each member of the original Tribunal a copy of the notice of registration, together with a copy of the application and of any accompanying documentation; and

(b) request each member of the Tribunal to inform him within a specified time limit whether that member is willing to take part in the consideration of the application.

(2) If all members of the Tribunal express their willingness to take part in the consideration of the application, the Secretary-General shall so notify the members of the Tribunal and the parties. Upon dispatch of these notices the Tribunal shall be deemed to be reconstituted.

(3) If the Tribunal cannot be reconstituted in accordance with paragraph (2), the Secretary-General shall so notify the parties and invite them to proceed, as soon as possible, to constitute a new Tribunal, including the same number of arbitrators, and appointed by the same method, as the original one.

Rule 52
Annulment: Further Procedures

(1) Upon registration of an application for the annulment of an award, the Secretary-General shall forthwith request the Chairman of the Administrative Council to appoint an ad hoc Committee in accordance with Article 52(3) of the Convention.

(2) The Committee shall be deemed to be constituted on the date the Secretary-General notifies the parties that all members have accepted their appointment. Before or at the first session of the Committee, each member shall sign a declaration conforming to that set forth in Rule 6(2).

Rule 53
Rules of Procedure

The provisions of these Rules shall apply mutatis mutandis to any procedure relating to the interpretation, revision or annulment of an award and to the decision of the Tribunal or Committee.

Rule 54
Stay of Enforcement of the Award

(1) The party applying for the interpretation, revision or annulment of an award may in its application, and either party may at any time before the final disposition of the application, request a stay in the enforcement of part or all of the award to which the application relates. The Tribunal or Committee shall give priority to the consideration of such a request.

(2) If an application for the revision or annulment of an award contains a request for a stay of its enforcement, the Secretary-General shall, together with the notice of registration, inform both parties of the provisional stay of the award. As soon as the Tribunal or Committee is constituted it shall, if either party requests, rule within 30 days on whether such stay should be continued; unless it decides to continue the stay, it shall automatically be terminated.

(3) If a stay of enforcement has been granted pursuant to paragraph (1) or continued pursuant to paragraph (2), the Tribunal or Committee may at any time modify or terminate the stay at the request of either party. All stays shall automatically terminate on the date on which a final decision is rendered on the application, except that a Committee granting the partial annulment of an award may order the temporary stay of enforcement of the unannulled portion in order to give either party an opportunity to request any new Tribunal constituted pursuant to Article 52(6) of the Convention to grant a stay pursuant to Rule 55(3).

(4) A request pursuant to paragraph (1), (2) (second sentence) or (3) shall specify the circumstances that require the stay or its modification or termination. A request shall only be granted after the Tribunal or Committee has given each party an opportunity of presenting its observations.

(5) The Secretary-General shall promptly notify both parties of the stay of enforcement of any award and of the modification or termination of such a stay, which shall become effective on the date on which he dispatches such notification.

Rule 55
Resubmission of Dispute after an Annulment

(1) If a Committee annuls part or all of an award, either party may request the resubmission of the dispute to a new Tribunal. Such a request shall be addressed in writing to the Secretary-General and shall:

(a) identify the award to which it relates;

(b) indicate the date of the request;

(c) explain in detail what aspect of the dispute is to be submitted to the Tribunal; and

(d) be accompanied by a fee for lodging the request.

(2) Upon receipt of the request and of the lodging fee, the Secretary-General shall forthwith:

(a) register it in the Arbitration Register;

(b) notify both parties of the registration;

(c) transmit to the other party a copy of the request and of any accompanying documentation; and

(d) invite the parties to proceed, as soon as possible, to constitute a new Tribunal, including the same number of arbitrators, and appointed by the same method, as the original one.

(3) If the original award had only been annulled in part, the new Tribunal shall not reconsider any portion of the award not so annulled. It may, however, in accordance with the procedures set forth in Rule 54, stay or continue to stay the enforcement of the unannulled portion of the award until the date its own award is rendered.

(4) Except as otherwise provided in paragraphs (1)–(3), these Rules shall apply to a proceeding on a resubmitted dispute in the same manner as if such dispute had been submitted pursuant to the Institution Rules.