Subject matter non-arbitrable is the negative consequence of the subject matter of a dispute falling outside the scope of that which is capable of resolution by arbitration under the applicable law.1 See further Arbitrability. Non-arbitrability precludes a tribunal from exercising jurisdiction over the particular subject matter. Where a tribunal has nonetheless exercised jurisdiction, any resulting award may be set aside2 or denied recognition and enforcement. See further Enforcement. The following discussion is limited to the topic of subject matter non-arbitrable as a ground for annulment or setting aside of investment arbitration awards.
Born, G. B., International Commercial Arbitration: Commentary and Materials, 2nd ed., 2014, p. 243.
Blackaby, N., Partasides, C., Redfern, A. and Hunter, M., Redfern and Hunter on International Arbitration, 2009, p. 124.
Born, G. B., International Commercial Arbitration: Commentary and Materials, 2nd ed., 2014, p. 334.
In the context of setting aside proceedings, there are two relevant applicable law or rules of law which outline what subjects are or are not arbitrable: the law governing the substance of the dispute (see further Applicable Law to the Merits) and the law governing the procedure of the dispute (i.e., the applicable lex arbitri; see further Applicable Law to the Proceeding).
In investment arbitration, the law governing the dispute will depend on the basis for the tribunal's jurisdiction. For example, Article 43(1) of the ICSID Convention provides:
"The Tribunal shall decide a dispute in accordance with such rules of law as may be agreed by the parties. In the absence of such agreement, the Tribunal shall apply the law of the Contracting State party to the dispute (including its rules on conflict of laws) and such rules of international law as may be applicable."
Such agreement by the parties may take the form of, inter alia, investment contracts, domestic (foreign) investment laws or international investment agreements ("IIAs", i.e., treaties). See further Applicable Law. In the case of an arbitration under an IIA, the merits of the dispute would be subject to international law and the particular terms of the relevant IIA, i.e., a lex specialis.
The basis of the tribunal's jurisdiction will also determine whether there is a domestic seat of arbitration (and therefore a lex arbitri), depending on whether consent is given to proceed to ICSID, non-ICSID institutional or ad hoc arbitration. Such will govern the procedure of the annulment proceedings.
In non-ICSID proceedings, the precise formulation by which subject matter non-arbitrability must be articulated as a ground for annulment or setting aside will depend on the applicable lex arbitri. For example, if annulment is sought in a country that has adopted the UNCITRAL Model law, Article 34(2)(b)(i) provides that the measure of arbitrability will also be subject to domestic law: "the subject-matter of the dispute is not capable of settlement by arbitration under the law of this State".3
Under the ICSID Convention, where there is no domestic seat of the arbitration, annulment of an award must take place in accordance with Article 52 of the ICSID Convention.4 In such case, arbitrability, as a matter concerning the jurisdiction of a tribunal, will depend on the instrument by which the tribunal is constituted "in concert with the ICSID Convention, as interpreted in the light of the general principles of international law."5 See further Annulment and .
Bantekas, I., Ortolani, P., Ali, S., Gomez, M. A. and Polkinghorne, M., UNCITRAL Model Law on International Commercial Arbitration: A Commentary, 2020, pp. 891-892.
Fouret, J., Gerbay, R. and Alvarez, G. M., The ICSID Convention, Regulations and Rules: A Practical Commentary, 2019, p. 571.
Although the ICSID Convention does not define the term “investment”, tribunals have generally agreed that there are objective limits to the concept of investment under the ICSID Convention. See further Definition of Investment. The most famous of such an objective limitation comes from the award in Salini v. Morocco8. So long as the dispute arises directly out of that investment, then the subject matter is arbitrable under the ICSID Convention. See further Salini Test.
Within the scope of disputes broadly capable of settlement by arbitration, States can delimit arbitrability within a particular IIA, investment contract or domestic (foreign) investment law. An example of such a limitation is Article 21 of the Energy Charter Treaty ("ECT"), which "excludes from the scope of the ECT’s protections taxation measures of a Contracting State".9 Other IIAs similarly limit the arbitrability of taxation measures.10 Other IIAs strictly limit consent to a narrow range of arbitrable disputes, for example related only to the "the amount or payment of compensation [for expropriation]."11
Where there is a domestic legal seat, the manner in which arbitrability is defined by the seat may also influence the interpretation of what is or is not arbitrable.12 Prior to the ECJ decision in Achmea, for example, several tribunals rejected arguments by respondent States that issues concerning EU law were non-arbitrable under intra-EU bilateral investment treaties as a result of the domestic legal regimes.13 Rather than determine that disputes concerning EU law were non-arbitrable, the ECJ invalidated altogether Article 8 of the relevant Netherlands-Slovak Republic BIT, i.e., the arbitration mechanism of the IIA. Rather than enhance the non-arbitrability argument, the decision – and the EU Member States' later decision to terminate their intra-EU BITs – rendered the argument moot.
Agreement among the Government of Brunei Darussalam, the Republic of Indonesia, Malaysia, the Republic of the Philippines, the Republic of Singapore, and the Kingdom of Thailand for the Promotion and Protection of Investments, 15 December 1987, entered into force on 2 August 1988 Art. V; Agreement Between the Government of the Argentine Republic and the Government of New Zealand for the Promotion and Reciprocal Protection of Investments, 27 August 1999, Art. 5(2).
Agreement Between the Government of the Republic of Finland and the Government of the Union of Soviet Socialist Republics for the Promotion and Reciprocal Protection of Investments, 8 February 1989, Art. 8(1); Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Union of Soviet Socialist Republics for the Promotion and Reciprocal Protection of Investments, 6 April 1989, Art. 8(1); Agreement Between the Federal Republic of Germany and the Union of Soviet Socialist Republics Concerning the Promotion and Reciprocal Protection of Investments, 13 June 1989, Art. 10(2).
Where lack of arbitrability is not an express ground in and of itself, it may be possible nonetheless to argue non-arbitrability either as a lack of a valid arbitration agreement (since no arbitration agreement was capable of being validly formed to settle the subject matter of the dispute),16 or as an excess of a tribunal's powers or mandate (since the tribunal was incapable of having the authority to exercise jurisdiction over the subject matter).17
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