Upon notification of the registration of the request for arbitration, the parties shall, with all possible dispatch, proceed to constitute a Tribunal, with due regard to Section 2 of Chapter IV of the Convention.

Unless such information is provided in the request, the parties shall communicate to the Secretary-General as soon as possible any provisions agreed by them regarding the number of arbitrators and the method of their appointment.

Except if each member of the Tribunal is appointed by agreement of the parties, nationals of the State party to the dispute or of the State whose national is a party to the dispute may be appointed by a party only if appointment by the other party to the dispute of the same number of arbitrators of either of these nationalities would not result in a majority of arbitrators of these nationalities.

No person who had previously acted as a conciliator or arbitrator in any proceeding for the settlement of the dispute may be appointed as a member of the Tribunal.

If the parties, at the time of the registration of the request for arbitration, have not agreed upon the number of arbitrators and the method of their appointment, they shall, unless they agree otherwise, follow the following procedure:

The communications provided for in paragraph (1) shall be made or promptly confirmed in writing and shall either be transmitted through the Secretary-General or directly between the parties with a copy to the Secretary-General. The parties shall promptly notify the Secretary-General of the contents of any agreement reached.

At any time 60 days after the registration of the request, if no agreement on another procedure is reached, either party may inform the Secretary-General that it chooses the formula provided for in Article 37(2)(b) of the Convention. The Secretary-General shall thereupon promptly inform the other party that the Tribunal is to be constituted in accordance with that Article.

If the Tribunal is to be constituted in accordance with Article 37(2)(b) of the Convention:

The communications provided for in this Rule shall be made or promptly confirmed in writing and shall either be transmitted through the Secretary-General or directly between the parties with a copy to the Secretary-General.

If the Tribunal is not constituted within 90 days after the dispatch by the Secretary General of the notice of registration, or such other period as the parties may agree, either party may, through the Secretary General, address to the Chairman of the Administrative Council a request in writing to appoint the arbitrator or arbitrators not yet appointed and to designate an arbitrator to be the President of the Tribunal.

The provision of paragraph (1) shall apply mutatis mutandis in the event that the parties have agreed that the arbitrators shall elect the President of the Tribunal and they fail to do so.

The Secretary-General shall forthwith send a copy of the request to the other party.

The Chairman shall, with due regard to Articles 38 and 40 (1) of the Convention, and after consulting both parties as far as possible, comply with that request within 30 days after its receipt.

The Secretary General shall promptly notify the parties of any appointment or designation made by the Chairman.

The party or parties concerned shall notify the Secretary-General of the appointment of each arbitrator and indicate the method of his appointment.

As soon as the Secretary-General has been informed by a party or the Chairman of the Administrative Council of the appointment of an arbitrator, he shall seek an acceptance from the appointee.

If an arbitrator fails to accept his appointment within 15 days, the SecretaryGeneral shall promptly notify the parties, and if appropriate the Chairman, and invite them to proceed to the appointment of another arbitrator in accordance with the method followed for the previous appointment.

The Tribunal shall be deemed to be constituted and the proceeding to have begun on the date the Secretary-General notifies the parties that all the arbitrators have accepted their appointment.

Before or at the first session of the Tribunal, each arbitrator shall sign a declaration in the following form:

If an arbitrator becomes incapacitated or unable to perform the duties of his office, the procedure in respect of the disqualification of arbitrators set forth in Rule 9 shall apply.

An arbitrator may resign by submitting his resignation to the other members of the Tribunal and the Secretary-General. If the arbitrator was appointed by one of the parties, the Tribunal shall promptly consider the reasons for his resignation and decide whether it consents thereto. The Tribunal shall promptly notify the SecretaryGeneral of its decision.

A party proposing the disqualification of an arbitrator pursuant to Article 57 of the Convention shall promptly, and in any event before the proceeding is declared closed, file its proposal with the Secretary-General, stating its reasons therefor.

The Secretary-General shall forthwith:

The arbitrator to whom the proposal relates may, without delay, furnish explanations to the Tribunal or the Chairman, as the case may be.

Unless the proposal relates to a majority of the members of the Tribunal, the other members shall promptly consider and vote on the proposal in the absence of the arbitrator concerned. If those members are equally divided, they shall, through the Secretary General, promptly notify the Chairman of the proposal, of any explanation furnished by the arbitrator concerned and of their failure to reach a decision.

Whenever the Chairman has to decide on a proposal to disqualify an arbitrator, he shall take that decision within 30 days after he has received the proposal.

The proceeding shall be suspended until a decision has been taken on the proposal.

The Secretary General shall forthwith notify the parties and, if necessary, the Chairman of the Administrative Council of the disqualification, death, incapacity or resignation of an arbitrator and of the consent, if any, of the Tribunal to a resignation.

Upon the notification by the Secretary-General of a vacancy on the Tribunal, the proceeding shall be or remain suspended until the vacancy has been filled.

Except as provided in paragraph (2), a vacancy resulting from the disqualification, death, incapacity or resignation of an arbitrator shall be promptly filled by the same method by which his appointment had been made.

In addition to filling vacancies relating to arbitrators appointed by him, the Chairman of the Administrative Council shall appoint a person from the Panel of Arbitrators:

The procedure for filling a vacancy shall be in accordance with Rules 1, 4(4), 4(5), 5 and, mutatis mutandis , 6(2).

The Tribunal shall hold its first session within 60 days after its constitution or such other period as the parties may agree. The dates of that session shall be fixed by the President of the Tribunal after consultation with its members and the Secretary-General. If upon its constitution the Tribunal has no President because the parties have agreed that the President shall be elected by its members, the Secretary-General shall fix the dates of that session. In both cases, the parties shall be consulted as far as possible.

The dates of subsequent sessions shall be determined by the Tribunal, after consultation with the Secretary General and with the parties as far as possible.

The Tribunal shall meet at the seat of the Centre or at such other place as may have been agreed by the parties in accordance with Article 63 of the Convention. If the parties agree that the proceeding shall be held at a place other than the Centre or an institution with which the Centre has made the necessary arrangements, they shall consult with the Secretary General and request the approval of the Tribunal. Failing such approval, the Tribunal shall meet at the seat of the Centre.

The Secretary General shall notify the members of the Tribunal and the parties of the dates and place of the sessions of the Tribunal in good time.

The President of the Tribunal shall conduct its hearings and preside at its deliberations.

Except as the parties otherwise agree, the presence of a majority of the members of the Tribunal shall be required at its sittings.

The President of the Tribunal shall fix the date and hour of its sittings.

The deliberations of the Tribunal shall take place in private and remain secret.

Only members of the Tribunal shall take part in its deliberations. No other person shall be admitted unless the Tribunal decides otherwise.

Decisions of the Tribunal shall be taken by a majority of the votes of all its members. Abstention shall count as a negative vote.

Except as otherwise provided by these Rules or decided by the Tribunal, it may take any decision by correspondence among its members, provided that all of them are consulted. Decisions so taken shall be certified by the President of the Tribunal.

Each party may be represented or assisted by agents, counsel or advocates whose names and authority shall be notified by that party to the Secretary-General, who shall promptly inform the Tribunal and the other party.

For the purposes of these Rules, the expression "party" includes, where the context so admits, an agent, counsel or advocate authorized to represent that party.

As early as possible after the constitution of a Tribunal, its President shall endeavor to ascertain the views of the parties regarding questions of procedure. For this purpose he may request the parties to meet him. He shall, in particular, seek their views on the following matters:

In the conduct of the proceeding the Tribunal shall apply any agreement between the parties on procedural matters, except as otherwise provided in the Convention or the Administrative and Financial Regulations.

At the request of the Secretary General or at the discretion of the President of the Tribunal, a pre hearing conference between the Tribunal and the parties may be held to arrange for an exchange of information and the stipulation of uncontested facts in order to expedite the proceeding.

At the request of the parties, a pre hearing conference between the Tribunal and the parties, duly represented by their authorized representatives, may be held to consider the issues in dispute with a view to reaching an amicable settlement.

The parties may agree on the use of one or two languages to be used in the proceeding, provided, that, if they agree on any language that is not an official language of the Centre, the Tribunal, after consultation with the Secretary-General, gives its approval. If the parties do not agree on any such procedural language, each of them may select one of the official languages (i.e. English, French and Spanish) for this purpose.

If two procedural languages are selected by the parties, any instruments may be filed in either language. Either language may be used at the hearings, subject, if the Tribunal so requires, to translation and interpretation. The orders and the award of the Tribunal shall be rendered and the record kept in both procedural languages, both versions being equally authentic.

Where required, time limits shall be fixed by the Tribunal by assigning dates for the completion of the various steps in the proceeding. The Tribunal may delegate this power to its President.

The Tribunal may extend any time limit that it has fixed. If the Tribunal is not in session, this power shall be exercised by its President.

Any step taken after expiration of the applicable time limit shall be disregarded unless the Tribunal, in special circumstances and after giving the other party an opportunity of stating its views, decides otherwise.

Without prejudice to the final decision on the payment of the cost of the proceeding, the Tribunal may, unless otherwise agreed by the parties, decide:

Promptly after the closure of the proceeding, each party shall submit to the Tribunal a statement of costs reasonably incurred or borne by it in the proceeding and the Secretary-General shall submit to the Tribunal an account of all amounts paid by each party to the Centre and of all costs incurred by the Centre for the proceeding. The Tribunal may, before the award has been rendered, request the parties and the Secretary-General to provide additional information concerning the cost of the proceeding.

In addition to the request for arbitration, the written procedure shall consist of the following pleadings, filed within time limits set by the Tribunal:

If the request was made jointly, each party shall, within the same time limit determined by the Tribunal, file its memorial and, if the parties so agree or the Tribunal deems it necessary, its reply; however, the parties may instead agree that one of them shall, for the purposes of paragraph (1), be considered as the requesting party.

A memorial shall contain: a statement of the relevant facts; a statement of law; and the submissions. A counter-memorial, reply or rejoinder shall contain an admission or denial of the facts stated in the last previous pleading; any additional facts, if necessary; observations concerning the statement of law in the last previous pleading; a statement of law in answer thereto; and the submissions.

The oral procedure shall consist of the hearing by the Tribunal of the parties, their agents, counsel and advocates, and of witnesses and experts.

The Tribunal shall decide, with the consent of the parties, which other persons besides the parties, their agents, counsel and advocates, witnesses and experts during their testimony, and officers of the Tribunal may attend the hearings.

The members of the Tribunal may, during the hearings, put questions to the parties, their agents, counsel and advocates, and ask them for explanations.

The Tribunal shall be the judge of the admissibility of any evidence adduced and of its probative value.

The Tribunal may, if it deems it necessary at any stage of the proceeding:

The parties shall cooperate with the Tribunal in the production of the evidence and in the other measures provided for in paragraph (2). The Tribunal shall take formal note of the failure of a party to comply with its obligations under this paragraph and of any reasons given for such failure.

Expenses incurred in producing evidence and in taking other measures in accordance with paragraph (2) shall be deemed to constitute part of the expenses incurred by the parties within the meaning of Article 61(2) of the Convention.

Witnesses and experts shall be examined before the Tribunal by the parties under the control of its President. Questions may also be put to them by any member of the Tribunal.

Each witness shall make the following declaration before giving his evidence:

Each expert shall make the following declaration before making his statement:

When the presentation of the case by the parties is completed, the proceeding shall be declared closed.

Exceptionally, the Tribunal may, before the award has been rendered, reopen the proceeding on the ground that new evidence is forthcoming of such a nature as to constitute a decisive factor, or that there is a vital need for clarification on certain specific points.

At any time during the proceeding a party may request that provisional measures for the preservation of its rights be recommended by the Tribunal. The request shall specify the rights to be preserved, the measures the recommendation of which is requested, and the circumstances that require such measures.

The Tribunal shall give priority to the consideration of a request made pursuant to paragraph (1).

The Tribunal may also recommend provisional measures on its own initiative or recommend measures other than those specified in a request. It may at any time modify or revoke its recommendations.

The Tribunal shall only recommend provisional measures, or modify or revoke its recommendations, after giving each party an opportunity of presenting its observations.

Nothing in this Rule shall prevent the parties, provided that they have so stipulated in the agreement recording their consent, from requesting any judicial or other authority to order provisional measures, prior to the institution of the proceeding, or during the proceeding, for the preservation of their respective rights and interests.

Except as the parties otherwise agree, a party may present an incidental or additional claim or counter-claim arising directly out of the subject-matter of the dispute, provided that such ancillary claim is within the scope of the consent of the parties and is otherwise within the jurisdiction of the Centre.

An incidental or additional claim shall be presented not later than in the reply and a counter-claim no later than in the counter-memorial, unless the Tribunal, upon justification by the party presenting the ancillary claim and upon considering any objection of the other party, authorizes the presentation of the claim at a later stage in the proceeding.

The Tribunal shall fix a time limit within which the party against which an ancillary claim is presented may file its observations thereon.

Any objection that the dispute or any ancillary claim is not within the jurisdiction of the Centre or, for other reasons, is not within the competence of the Tribunal shall be made as early as possible. A party shall file the objection with the SecretaryGeneral no later than the expiration of the time limit fixed for the filing of the counter-memorial, or, if the objection relates to an ancillary claim, for the filing of the rejoinder—unless the facts on which the objection is based are unknown to the party at that time.

The Tribunal may on its own initiative consider, at any stage of the proceeding, whether the dispute or any ancillary claim before it is within the jurisdiction of the Centre and within its own competence.

Upon the formal raising of an objection relating to the dispute, the proceeding on the merits shall be suspended. The President of the Tribunal, after consultation with its other members, shall fix a time limit within which the parties may file observations on the objection.

The Tribunal shall decide whether or not the further procedures relating to the objection shall be oral. It may deal with the objection as a preliminary question or join it to the merits of the dispute. If the Tribunal overrules the objection or joins it to the merits, it shall once more fix time limits for the further procedures.

If the Tribunal decides that the dispute is not within the jurisdiction of the Centre or not within its own competence, it shall render an award to that effect.

If a party (in this Rule called the "defaulting party") fails to appear or to present its case at any stage of the proceeding, the other party may, at any time prior to the discontinuance of the proceeding, request the Tribunal to deal with the questions submitted to it and to render an award.

The Tribunal shall promptly notify the defaulting party of such a request. Unless it is satisfied that that party does not intend to appear or to present its case in the proceeding, it shall, at the same time, grant a period of grace and to this end:

After the expiration of the period of grace or when, in accordance with paragraph (2), no such period is granted, the Tribunal shall resume the consideration of the dispute. Failure of the defaulting party to appear or to present its case shall not be deemed an admission of the assertions made by the other party.

The Tribunal shall examine the jurisdiction of the Centre and its own competence in the dispute and, if it is satisfied, decide whether the submissions made are wellfounded in fact and in law. To this end, it may, at any stage of the proceeding, call on the party appearing to file observations, produce evidence or submit oral explanations.

If, before the award is rendered, the parties agree on a settlement of the dispute or otherwise to discontinue the proceeding, the Tribunal, or the Secretary-General if the Tribunal has not yet been constituted, shall, at their written request, in an order take note of the discontinuance of the proceeding.

If the parties file with the Secretary-General the full and signed text of their settlement and in writing request the Tribunal to embody such settlement in an award, the Tribunal may record the settlement in the form of its award.

The award shall be in writing and shall contain:

The award shall be signed by the members of the Tribunal who voted for it; the date of each signature shall be indicated.

Any member of the Tribunal may attach his individual opinion to the award, whether he dissents from the majority or not, or a statement of his dissent.

Upon signature by the last arbitrator to sign, the Secretary-General shall promptly:

The award shall be deemed to have been rendered on the date on which the certified copies were dispatched.

The Secretary-General shall, upon request, make available to a party additional certified copies of the award.

The Centre shall not publish the award without the consent of the parties. The Centre may, however, include in its publications excerpts of the legal rules applied by the Tribunal.

Within 45 days after the date on which the award was rendered, either party may request, pursuant to Article 49(2) of the Convention, a supplementary decision on, or the rectification of, the award. Such a request shall be addressed in writing to the Secretary-General. The request shall:

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

The President of the Tribunal shall consult the members on whether it is necessary for the Tribunal to meet in order to consider the request. The Tribunal shall fix a time limit for the parties to file their observations on the request and shall determine the procedure for its consideration.

Rules 46 48 shall apply, mutatis mutandis , to any decision of the Tribunal pursuant to this Rule.

If a request is received by the Secretary-General more than 45 days after the award was rendered, he shall refuse to register the request and so inform forthwith the requesting party.

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

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

The Secretary General shall refuse to register an application for:

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

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

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.

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.

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

The Committee shall be deemed to be constituted on the date the SecretaryGeneral 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).

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.

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.

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).

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.

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.

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:

Upon receipt of the request and of the lodging fee, the Secretary General shall forthwith:

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.

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.

The texts of these Rules in each official language of the Centre shall be equally authentic.

These Rules may be cited as the "Arbitration Rules" of the Centre.