Applicability of the Rules
1. The UNCITRAL Rules on Transparency in Treaty-based Investor-State Arbitration (“Rules on Transparency”) shall apply to investor-State arbitration initiated under the UNCITRAL Arbitration Rules pursuant to a treaty providing for the pro- tection of investments or investors (“treaty”)* concluded on or after 1 April 2014 unless the Parties to the treaty** have agreed otherwise.
2. In investor-State arbitrations initiated under the U NCITRAL Arbitration Rules pursuant to a treaty concluded before 1 April 2014, these Rules shall apply only when:
a)
The parties to an arbitration (the “disputing parties”) agree to their application in respect of that arbitration; or
b)
The Parties to the treaty or, in the case of a multi- lateral treaty, the State of the claimant and the respondent State, have agreed after 1 April 2014 to their application.
Application of the Rules
3. In any arbitration in which the Rules on Transparency apply pursuant to a treaty or to an agreement by the Parties to that treaty:
a)
The disputing parties may not derogate from these Rules, by agreement or otherwise, unless permitted to do so by the treaty;
b)
The arbitral tribunal shall have the power, besides its discretionary authority under certain provisions of these Rules, to adapt the requirements of any specific provision of these Rules to the particular circumstances of the case, after consulta- tion with the disputing parties, if such adaptation is necessary to conduct the arbitration in a practical manner and is consistent with the transparency objective of these Rules.
Discretion and authority of the arbitral tribunal
4. Where the Rules on Transparency provide for the arbitral tribunal to exercise discretion, the arbitral tribunal in exercising such discretion shall take into account:
a)
The public interest in transparency in treaty-based investor-State arbitration and in the particular arbitral proceed- ings; and
b)
The disputing parties’ interest in a fair and efficient resolution of their dispute.
5. These Rules shall not affect any authority that the arbitral tribunal may otherwise have under the UNCITRAL Arbitration Rules to conduct the arbitration in such a manner as to promote transparency, for example by accepting submissions from third persons.
6. In the presence of any conduct, measure or other action having the effect of wholly undermining the transparency objec- tives of these Rules, the arbitral tribunal shall ensure that those objectives prevail. Applicable instrument in case of conflict
7. Where the Rules on Transparency apply, they shall sup- plement any applicable arbitration rules. Where there is a con- flict between the Rules on Transparency and the applicable arbitration rules, the Rules on Transparency shall prevail. Not- withstanding any provision in these Rules, where there is a conflict between the Rules on Transparency and the treaty, the provisions of the treaty shall prevail.
8. Where any of these Rules is in conflict with a provision of the law applicable to the arbitration from which the disputing parties cannot derogate, that provision shall prevail. Application in non-UNCITRAL arbitrations
9. These Rules are available for use in investor-State arbi- trations initiated under rules other than the UNCITRAL Arbitration Rules or in ad hoc proceedings.