I. THE PARTIES

1. The Claimants are Caratube International Oil Company LLP (“Caratube”), a Kazakh-incorporated company, and Mr. Devincci Salah Hourani, a U.S. national (jointly “the Claimants”)1.

2. The Respondent is the Republic of Kazakhstan (“Kazakhstan” or “the Respondent”).

II. PROCEDURAL HISTORY

3. On 5 June 2013, the Claimants submitted a Request of Arbitration against the Respondent (the “Request of Arbitration”) to the International Centre for Settlement of Investment Disputes (“ICSID”).

4. On 28 June 2013, the Secretary-General of ICSID registered the Request of Arbitration pursuant to Article 36(3) of the Convention on the Settlement of Investment Disputes between States and Nationals of Other States, dated 18 March 1965 (the “ICSID Convention”).

5. On 4 September 2013, the Claimants, represented by the law firm Derains & Gharavi, appointed Prof. Laurent Aynès to serve as arbitrator.

6. On 26 September 2013, the Respondent, represented by the law firm Curtis, Mallet-Prevost, Colt & Mosle LLP, appointed Mr. Bruno Boesch to serve as arbitrator.

7. By letters dated 1 October and 19 November 2013, the Claimants “flagged their concerns in relation to Mr. Boesch’s serving as co-arbitrator appointed by Curtis, Mallet-Prevost, Colt & Mosle LLP in several cases”2, including the UNCITRAL arbitration in Ruby Roz Agricol v. The Republic of Kazakhstan. They therefore requested that Mr. Boesch indicate “the number of appointments he has received by Curtis, Mallet-Prevost, Colt & Mosle LLP, any other professional interactions in any capacity between Curtis, Mallet-Prevost, Colt & Mosle LLP and Mr. Boesch, as well as any other circumstances that could in the eyes of the Parties and ICSID affect his independence and impartiality”3.

8. On 3 December 2013, pursuant to Article 6(2) of the ICSID Arbitration Rules, Mr. Boesch made the following disclosure: