Rule 6Constitution of the Tribunal

(1) 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.

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

“To the best of my knowledge there is no reason why I should not serve on the Arbitral Tribunal constituted by the International Centre for Settlement of Investment Disputes with respect to a dispute between ___________________and___________________.

“I shall keep confidential all information coming to my knowledge as a result of my participation in this proceeding, as well as the contents of any award made by the Tribunal.

“I shall judge fairly as between the parties, according to the applicable law, and shall not accept any instruction or compensation with regard to the proceeding from any source except as provided in the Convention on the Settlement of Investment Disputes between States and Nationals of Other States and in the Regulations and Rules made pursuant thereto.

“Attached is a statement of (a) my past and present professional, business and other relationships (if any) with the parties and (b) any other circumstance that might cause my reliability for independent judgment to be questioned by a party. I acknowledge that by signing this declaration, I assume a continuing obligation promptly to notify the Secretary-General of the Centre of any such relationship or circumstance that subsequently arises during this proceeding.”

Any arbitrator failing to sign a declaration by the end of the first session of the Tribunal shall be deemed to have resigned.

Rule 9Disqualification of Arbitrators

(1) 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.

(2) The Secretary-General shall forthwith:

(a) transmit the proposal to the members of the Tribunal and, if it relates to a sole arbitrator or to a majority of the members of the Tribunal, to the Chairman of the Administrative Council; and

(b) notify the other party of the proposal.

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

(4) 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.

(5) Whenever the Chairman has to decide on a proposal to disqualify an arbitrator, he shall use his best efforts to take that decision within 30 days after he has received the proposal.

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

Rule 18
Representation of the Parties

(1) 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.

(2) 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.

Rule 19
Procedural Orders

The Tribunal shall make the orders required for the conduct of the proceeding.

Rule 27Waiver

A party which knows or should have known that a provision of the Administrative and Financial Regulations, of these Rules, of any other rules or agreement applicable to the proceeding, or of an order of the Tribunal has not been complied with and which fails to state promptly its objections thereto, shall be deemed—subject to Article 45 of the Convention—to have waived its right to object.

Rule 39Provisional Measures

(1) At any time after the institution of 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.

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

(3) 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.

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

(5) If a party makes a request pursuant to paragraph (1) before the constitution of the Tribunal, the Secretary-General shall, on the application of either party, fix time limits for the parties to present observations on the request, so that the request and observations may be considered by the Tribunal promptly upon its constitution.

(6) 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 or after the institution of the proceeding, for the preservation of their respective rights and interests.

Rule 40 Ancillary Claims

(1) 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.

(2) An incidental or additional claim shall be presented not later than in the reply and a counter-claim no later than in the countermemorial, 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.

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

Rule 41Preliminary Objections

(1) 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 Secretary-General 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.

(2) 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.

(3) Upon the formal raising of an objection relating to the dispute, the Tribunal may decide to suspend the proceeding on the merits. 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.

(4) The Tribunal shall decide whether or not the further procedures relating to the objection made pursuant to paragraph (1) 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.

(5) Unless the parties have agreed to another expedited procedure for making preliminary objections, a party may, no later than 30 days after the constitution of the Tribunal, and in any event before the first session of the Tribunal, file an objection that a claim is manifestly without legal merit. The party shall specify as precisely as possible the basis for the objection. The Tribunal, after giving the parties the opportunity to present their observations on the objection, shall, at its first session or promptly thereafter, notify the parties of its decision on the objection. The decision of the Tribunal shall be without prejudice to the right of a party to file an objection pursuant to paragraph (1) or to object, in the course of the proceeding, that a claim lacks legal merit.

(6) If the Tribunal decides that the dispute is not within the jurisdiction of the Centre or not within its own competence, or that all claims are manifestly without legal merit, it shall render an award to that effect.

Rule 42Default

(1) 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.

(2) 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:

(a) if that party had failed to file a pleading or any other instrument within the time limit fixed therefor, fix a new time limit for its filing; or

(b) if that party had failed to appear or present its case at a hearing, fix a new date for the hearing.

The period of grace shall not, without the consent of the other party, exceed 60 days.

(3) 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.

(4) 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 well-founded 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.

Rule 44
Discontinuance at Request of a Party

If a party requests the discontinuance of the proceeding, the Tribunal, or the Secretary-General if the Tribunal has not yet been constituted, shall in an order fix a time limit within which the other party may state whether it opposes the discontinuance. If no objection is made in writing within the time limit, the other party shall be deemed to have acquiesced in the discontinuance and the Tribunal, or if appropriate the Secretary-General, shall in an order take note of the discontinuance of the proceeding. If objection is made, the proceeding shall continue.

Rule 55

(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.

Rule 49

Supplementary Decisions and Rectification

(1) 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:

(a) identify the award to which it relates;
(b) indicate the date of the request;
(c) state in detail:

(i) any question which, in the opinion of the requesting party, the Tribunal omitted to decide in the award; and
(ii) any error in the award which the requesting party seeks to have rectified; 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 the request;
(b) notify the parties of the registration;
(c) transmit to the other party a copy of the request and of any accompanying documentation; and
(d) transmit to each member of the Tribunal a copy of the notice of registration, together with a copy of the request and of any accompanying documentation.

(3) 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.

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

(5) 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.