The Tribunal is constituted in accordance with Article 37(2)(a) of the ICSID Convention. Its members are: Lawrence Collins (British), President, appointed by agreement of the parties; Peter Rees (British), appointed by the Claimants; and Rolf Knieper (German), appointed by the Respondent.

Following appointment by agreement of the parties, Lawrence Collins (British) accepts his appointment as presiding arbitrator.

The Respondent files a rejoinder on the merits and reply on jurisdiction.

The Tribunal holds a pre-hearing organizational meeting with the parties by telephone conference.

The Tribunal issues Procedural Order No. 5 concerning the organization of the hearing.

The Claimants file a rejoinder on jurisdiction.

The Respondent files a request for the Tribunal to decide on the admissibility of new documents.

The Claimants file observations on the Respondent's request of March 16, 2018.

The Tribunal decides on the Respondent’s request of March 16, 2018.

The Tribunal holds a hearing on jurisdiction and the merits in Paris.

The Claimants file a request for the Tribunal to decide on the admissibility of a new document.

The Respondent files observations on the Claimants’ request of May 23, 2018.

Each party files a post-hearing brief.

The Claimants file a request for the Tribunal to decide on the admissibility of a new document.

The Claimants file a request for the Tribunal to decide on the admissibility of a new document.

The Respondent files observations on the Claimants’ request of September 5, 2018, and files a request for the Tribunal to decide on the admissibility of a new document.

The Claimants file observations on the Respondent’s request of September 11, 2018.

The Tribunal decides on the Claimants’ request of September 5, 2018 and on the Respondent’s request of September 11, 2018.

A non-disputing party files an application pursuant to ICSID Arbitration Rule 37(2).

Each party files observations on the non-disputing party’s application.

The Tribunal issues a decision on the non-disputing party’s application of October 16, 2018.

A non-disputing party files a written submission pursuant to ICSID Arbitration Rule 37(2).

Each party files observations on the non-disputing party’s written submission pursuant to ICSID Arbitration Rule 37(2).

The Respondent files a request for the Tribunal to decide on the admissibility of a new document.

The Claimants file observations on the Respondent’s request of January 28, 2019.

The Tribunal decides on the Respondent’s request of January 28, 2019.

The Respondent files observations on a new document.

The Claimants file observations on a new document.

The Respondent files a request for the Tribunal to decide on the admissibility of a new document.

The Claimants file observations on the Respondent’s request of March 14, 2019.

The Tribunal decides on the admissibility of a new document.

The Respondent files observations on a new document.

The Claimants file observations on a new document.

The Respondent files a statement of costs.

The Claimants file a statement of costs.

The Respondent files observations on Claimants’ statement of costs of April 18, 2019.

The Respondent files a request for the Tribunal to decide on the admissibility of new documents.

The Claimants file observations on the Respondent’s request of December 4, 2019.

The Tribunal decides on the admissibility of new evidence.

The Respondent files a proposal for disqualification of arbitrator Peter Rees. The proceeding is suspended in accordance with ICSID Arbitration Rule 9(6).

The Claimants file observations on the proposal for disqualification.

The arbitrator furnishes explanations regarding the proposal for disqualification in accordance with ICSID Arbitration Rule 9(3).

The proposal for disqualification of arbitrator Peter Rees is declined by the co-arbitrators. The proceeding is resumed pursuant to ICSID Arbitration Rule 9(6).

The Tribunal issues a decision on jurisdiction, liability and directions on quantum.

The parties file a joint memorandum by their respective experts identifying areas of agreement and disagreement on issues of quantum.

The Respondent files a request for the Tribunal to decide on the admissibility of a new document.

The Claimants file observations on the Respondent’s request of June 17, 2020.

The Tribunal decides on the admissibility of a new document.

The Tribunal declares the proceeding closed in accordance with ICSID Arbitration Rule 38(1).

The Tribunal renders its award.

The Secretary-General registers an application for annulment of the award filed by the Kingdom of Spain and notifies the parties of the provisional stay of enforcement of the award.

The ad hoc Committee is constituted in accordance with Article 52(3) of the ICSID Convention.  Its members are: Wendy J. Miles (New Zealand), President; José Antonio Moreno Rodríguez (Paraguayan); and Jacomijn J. van Haersolte-van Hof (Dutch); all members appointed by the Chairman of the Administrative Council.

A non-disputing party files an application pursuant to ICSID Arbitration Rule 37(2).

The Kingdom of Spain files a request to continue the stay of enforcement of the award.

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file observations on the Kingdom of Spain’s request to continue the stay of enforcement of the award.

Each party files observations on the non-disputing party’s application.

The ad hoc Committee holds a first session by video conference.

The Kingdom of Spain files a reply on the request to continue the stay of enforcement of the award.

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a rejoinder on the request to continue the stay of enforcement of the award.

The ad hoc Committee issues Procedural Order No. 1 concerning procedural matters.

The Kingdom of Spain files a request for the ad hoc Committee to decide on the admissibility of new evidence.

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file observations on the Kingdom of Spain’s request of March 5, 2021.

The ad hoc Committee issues a decision on the continuation of the stay of enforcement of the award.

The ad hoc Committee issues Procedural Order No. 2 concerning the admissibility of new evidence.

The Kingdom of Spain files a memorial on annulment.

The ad hoc Committee issues Procedural Order No. 3 concerning the non-disputing party’s application pursuant to ICSID Arbitration Rule 37(2).

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a counter-memorial on annulment.

A non-disputing party files an application pursuant to ICSID Arbitration Rule 37(2).

The Kingdom of Spain files a reply on annulment.

The Kingdom of Spain files observations on the non-disputing party’s application.

The ad hoc Committee holds a pre-hearing organizational meeting with the parties by video conference. 

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a rejoinder on annulment.

The ad hoc Committee issues Procedural Order No. 4 concerning the organization of the hearing.

The ad hoc Committee issues Procedural Order No. 5 concerning the non-disputing party’s application pursuant to ICSID Arbitration Rule 37(2).

The Kingdom of Spain files a proposal for disqualification of ad hoc Committee member Wendy J. Miles. The proceeding is suspended in accordance with ICSID Arbitration Rules 53 and 9(6).

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a reply on the proposal for disqualification. 

The Kingdom of Spain files additional observations on the proposal for disqualification.  

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file observations on the proposal for disqualification.

The proposal for disqualification of ad hoc Committee member Wendy J. Miles is rejected by the other two members of the ad hoc Committee.  The proceeding is resumed pursuant to ICSID Arbitration Rules 53 and 9(6).

The Kingdom of Spain files a request for reconsideration of the ad hoc Committee's decision on the stay of enforcement of the award.

The ad hoc Committee holds a hearing on annulment by video conference. 

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a response to the Kingdom of Spain’s request of February 7, 2022. 

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a request for the ad hoc Committee to decide on the admissibility of new evidence. 

The Kingdom of Spain files observations on Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB’s request of April 1, 2022.

The Kingdom of Spain files a request for the ad hoc Committee to decide on the admissibility of new evidence.

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a request for the ad hoc Committee to decide on the admissibility of new evidence.  

The Kingdom of Spain files observations on Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB’s request of June 16, 2022.  

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a response to the Kingdom of Spain’s request of May 6, 2022.

The ad hoc Committee issues a decision on the Kingdom of Spain’s request of February 7, 2022.

The Kingdom of Spain files a submission on costs.

Hydro Energy 1 S.à r.l. and Hydroxana Sweden AB file a statement of costs.

The ad hoc Committee declares the proceeding closed in accordance with ICSID Arbitration Rules 53 and 38(1). 

The ad hoc Committee issues its decision on annulment.