The Comprehensive and Progressive Agreement for Trans-Pacific … – Lexology

Credit: Original article can be found here

This article is an extract from The Investment Treaty Arbitration Review, 7th Edition. Click here for the full guide.

I Introduction

The Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) evolved out of the long-negotiated Trans-Pacific Partnership Agreement (TPP). The CPTPP, which entered into force on 30 December 2018, constitutes one of the world’s largest regional free trade and investment agreements, encompassing a combined gross domestic product (GDP) of US$10 trillion – almost 13.5 per cent of global GDP – 495 million people and more than 15 per cent of global trade.2

The CPTPP’s investment chapter contains a number of interesting provisions that clarify the scope of substantive investment protections and address some of the concerns about the current investor-state dispute settlement (ISDS) regime. This commentary focuses on the most relevant provisions of the CPTPP’s investment chapter and explains why it qualifies as a modern investment agreement.

II Negotiation history

i Trans-Pacific Partnership Agreement

The TPP was negotiated to reduce tariff and non-tariff barriers to international trade in the Asia-Pacific region, and addresses matters such as intellectual property, investment and dispute settlement, among others. Negotiations for the TPP began in January 2008 between the United States and members of the Trans-Pacific Strategic Economic Partnership Agreement – Brunei, Chile, Singapore and New Zealand. In November 2008, Australia, Vietnam and Peru joined the negotiations, followed by Mexico and Canada in October 2012 and by Japan in July 2013. Because of the involvement of the United States, the TPP initially encompassed nearly 40 per cent of global GDP, more than 800 million people and around one-third of global trade.3

The TPP was shaped in 19 official negotiation rounds between March 2010 and August 2013. The end of official negotiations coincided with the late addition of Japan in July 2013, after which unofficial negotiations in the form of chief negotiator meetings and ministerial meetings took place.4 The terms of the TPP were finally agreed on 4 October 2015. On 4 February 2016, the TPP was signed by 12 Pacific Rim states – Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, the United States and Vietnam.

The TPP was to enter into force when at least six parties accounting for 85 per cent of the combined GDP of the 12 Member States ratified the agreement. Thus, essentially both Japan and the United States (representing 60 per cent of the combined GDP of the TPP Member States) had to ratify the TPP for it to enter into force. On 23 January 2017, on his fourth day in office, President Donald J Trump withdrew the United States from the TPP by Executive Order, effectively preventing the TPP from ever taking effect.

ii The Comprehensive and Progressive Agreement for Trans-Pacific Partnership

With the TPP unable to enter into force after the withdrawal of the United States, the remaining Member States, led by Japan,5intent on executing a binding agreement, agreed in May 2017 to revive and revise the TPP (the CPTPP). In doing so, 22 provisions from the original TPP that had primarily been pushed by the United States were suspended or modified, as they were not widely supported by the remaining members. After less than a year of negotiations, the CPTPP was signed by Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore and Vietnam on 8 March 2018.

The CPTPP was ratified by Australia, Canada, Japan, Mexico, New Zealand, Singapore and Vietnam in late 2018, and by Peru in July 2021. The CPTPP entered into force, as of 30 December 2018, between Australia, Canada, Japan, Mexico, New Zealand and Singapore, as of 14 January 2019 for Vietnam and as of 19 September 2021 for Peru.6 As of March 2022, Brunei, Chile and Malaysia had yet to ratify the partnership. The CPTPP is open for subsequent accession by other states, mainly Asia-Pacific Economic Cooperation member states; furthermore, Colombia, the Philippines and Thailand, among others, seem to have expressed interest in joining.7 On 1 February 2021, with Brexit in effect, the United Kingdom submitted its formal request for accession and is on track to join by the end of 2022.8 In September 2021, China and Taiwan both applied to join the CPTPP.9 In December 2021, Ecuador submitted its application and South Korea announced it would submit its application after completing the necessary internal procedures.10 Considering that, to join the trade deal, an applicant needs the approval of all existing members, some difficult political decisions about some of the new applications may lie ahead. It appears that the Biden administration does not intend for the United States to join the CPTPP, instead preferring to seek a more extensive framework.11 Interest in accession to the CPTPP may also be (positively or negatively) influenced by the signing of the Regional Comprehensive Economic Partnership by 15 Indo-Pacific states in November 2020.12

III Content of the CPTPP Investment Chapter

The CPTPP largely incorporates the terms of the TPP by reference and makes them part of the CPTPP mutatis mutandis (CPTPP, Article 1.1). This also applies to Chapter 9 of the TPP on ‘Investment’ (the CPTPP Investment Chapter).

The CPTPP leaves the substantive investment protections in Section A of Chapter 9 unchanged. However, with respect to ISDS matters contained in Section B of Chapter 9, the CPTPP suspends the application of provisions on claims arising out of investment authorisations and investment agreements originally foreseen by the TPP.13 This means that, under the CPTPP, only claims that relate to a breach of the substantive investment protections contained in Section A of the CPTPP Investment Chapter can be submitted to ISDS.

i Scope of investment protection

Article 9.2 regulates the scope of the CPTPP Investment Chapter. To benefit from its protections, the threshold definitions of investor and covered investment must be satisfied, as well as the threshold for the CPTPP Investment Chapter’s application ratione temporis. When it comes to the imposition of performance requirements (Article 9.10) or regulation in the public interest (Article 9.16), the CPTPP Investment Chapter applies to all investments inside Member States, including non-CPTPP investments (e.g., those made by investors from non-parties). This is because, in certain circumstances, partial or non-application of such measures could create competitive disadvantages for CPTPP investments.14


Defined as broadly as under the 2012 US Model Bilateral Investment Treaty (BIT), an investor of a CPTPP Member State refers to a CPTPP Member State itself, or a national or an enterprise of a CPTPP Member State, that attempts to make, is making or has made an investment in the territory of another Member State (Article 9.1).15 Thus, not only nationals and enterprises but also CPTPP Member States, and even separate customs territories for which the CPTPP is in force, fall under the definition of an investor (Article 9.1).

The rather broad notion of ‘investor’ is counterbalanced by CPTPP Member States reserving the right to deny the benefits of the CPTPP Investment Chapter to certain investors and their investments in either of the following two situations (denial of benefits):

  1. if the investor is an enterprise of another CPTPP Member State owned or controlled by a person of a non-CPTPP Member State or the host state, that has no substantial business activities in the territory of any CPTPP Member State other than in the host state (Article 9.15.1);16 or
  2. if the investor is an enterprise of another CPTPP Member State owned or controlled by a person of a non-CPTPP Member State, and the host state adopts or maintains measures with respect to the non-CPTPP Member State or a person thereof, that prohibit transactions with the enterprise or that would be violated or circumvented if the benefits of the CPTPP Investment Chapter were accorded to the enterprise or its investments (Article 9.15.2).

Where a respondent state successfully establishes either of the above situations in an ISDS proceeding, a claim is likely to be rejected.17


The definition of ‘investment’ is correspondingly broad. Similar to the 2012 US Model BIT, the CPTPP Investment Chapter uses the term ‘characteristics of an investment’, which includes the commitment of resources, expectation of profit or assumption of risk (Article 9.1).18 Unlike some other investment agreements,19 the CPTPP Investment Chapter contains no requirement to be ‘in accordance with host state law’. Further, as in many other investment agreements, a non-exhaustive list of forms of investments is set out; however, it expressly excludes an order or judgment entered in a judicial or administrative action (Article 9.1). Whether an arbitral award may constitute an investment remains unclear but, in light of the wording, cannot be ruled out.20

Application ratione temporis

The CPTPP Investment Chapter defines covered investments as those investments in existence as of the date of entry into force of the CPTPP, or established, acquired or expanded thereafter (Article 9.1). In other words, it applies to all investments, whether made before or after its entry into force.21 However, the CPTPP Investment Chapter will not bind a CPTPP Member State in relation to an act or fact occurring before the CPTPP’s entry into force for that Member State (Article 9.2.3).

Limitations of scope for certain areas

Investments in financial services are governed by the Financial Services Chapter (Chapter 11), which incorporates only some of the provisions of the CPTPP Investment Chapter by reference.22 Accordingly, investors can only invoke these provisions in ISDS proceedings.23

With respect to taxation measures, the scope of substantive protections is narrowed (Article 29.4).24

ii Substantive standards of investment protection

The most frequently invoked substantive standards of investment protection seem to have been somewhat curtailed in the CPTPP Investment Chapter (when compared with other investment agreements), presumably to ensure greater regulatory freedom of the Member States. This ‘right to regulate’ is emphasised throughout.

In a similar vein, the Member States retain interpretative control over the scope of the substantive standards. Chapter 27 provides for the forming of a TPP Commission (the Commission), which can issue interpretations of the CPTPP Investment Chapter that are binding on tribunals (Article 9.25.3).

National treatment and most-favoured nation treatment

Like practically all investment agreements, the CPTPP Investment Chapter prohibits nationality-based discrimination by the host state. The CPTPP Investment Chapter’s national treatment clause requires CPTPP Member States to guarantee treatment of investors of another CPTPP Member State and covered investments that is no less favourable than the treatment they accord, in like circumstances, to their own investors and their investments in their territories.25 It also requires CPTPP Member States to guarantee investors of another CPTPP Member State and covered investments no less favourable treatment than they accord, in like circumstances, to investors of any other state and their investments.26

It is widely accepted that differentiations are justifiable if rational grounds can be shown. The CPTPP Investment Chapter clarifies in a footnote that whether treatment is accorded in ‘like circumstances’ depends on the totality of the circumstances, including whether the relevant treatment distinguishes between investors or investments on the basis of legitimate public welfare objectives.27

Article 9.5.3 of the CPTPP Investment Chapter speaks to the long-standing controversy of whether most-favoured nation (MFN) clauses can apply to dispute settlement provisions by clarifying that the treatment referred to in the MFN clause does not encompass international dispute resolution procedures or mechanisms, such as ISDS covered in Section B of the CPTPP Investment Chapter.

Another limitation of the MFN clause arises out of all the CPTPP Member States appearing to have expressed in some form that the MFN clause shall not extend to legal protections in their investment agreements already in force, but only to those protections in future investment agreements signed by a Member State.28 This will require the CPTPP Member States to adopt consistent practices when they conclude future investment treaties.29

Customary international law minimum standard of treatment of aliens

Similar to the United States–Mexico–Canada Agreement (USMCA) – which has superseded the North American Free Trade Agreement (NAFTA)30 – the CPTPP Investment Chapter equates the fair and equitable treatment (FET) standard (and full protection and security) with the minimum standard of treatment under customary international law (Article 9.6.1). Moreover, the CPTPP Investment Chapter incorporates a NAFTA Free Trade Commission’s Note,31 and provides that the concepts of FET and full protection and security do not require measures in addition to or beyond that required by the minimum standard of treatment of aliens, and do not create additional substantive rights (Article 9.6.2). This is echoed in a significant and growing number of international investment agreements involving CPTPP Member States.32

By limiting the FET standard to customary international law, the CPTPP Investment Chapter seeks to rein in the discretion of tribunals when considering the standard’s content. In reality, however, the minimum standard itself is quite indeterminate and requires interpretation. The process of establishing the content of customary international law (determining state practice and opinio juris) is methodologically difficult and puts an onerous burden on the claimants.33 This may become an issue under the CPTPP Investment Chapter according to which an investor has the burden of proving all elements of its claims, consistent with general principles of international law applicable to international arbitration (Article 9.23.7).34 In arbitral practice, the link to the minimum standard of treatment has hardly led to differing interpretations and applications of the FET standard, irrespective of which governing standard is ultimately assumed.35

There are also other novel attempts to articulate the FET standard in the context of certain controversial issues; for example, clarification that breach of the FET standard is not constituted by a party merely (1) taking or failing to take an action that may be inconsistent with an investor’s expectations, or (2) modifying or reducing (or alternatively not issuing, renewing or maintaining) a subsidy or grant, even if either scenario results in loss or damage to the covered investment (Articles 9.6.4, 9.6.5).


CPTPP Member States agree not to expropriate or nationalise covered investments, either directly or indirectly, except (1) for a public purpose, (2) in a non-discriminatory manner, (3) on payment of prompt, adequate and effective compensation, and (4) in accordance with due process of law (Article 9.8.1). These elements are generally in line with many other international investment agreements.

An annex to the CPTPP Investment Chapter elaborates on the meaning of expropriation and requires, in determining an indirect expropriation, a case-by-case, fact-based inquiry that considers the economic effects, legitimate expectations and character of the government action, among other factors. Non-discriminatory regulatory actions that are designed and applied to protect legitimate public welfare objectives do not constitute indirect expropriation (Annex 9-B(3)).36

The CPTPP Investment Chapter clarifies the concept of expropriation in the context of subsidies and grants. A CPTPP Member State’s decision not to issue, renew or maintain a subsidy or grant, or a decision to modify or reduce a subsidy or grant, in the absence of a legal or contractual commitment to do so, or in accordance with terms of the subsidy or grant, standing alone, does not constitute expropriation (Article 9.8(6)).

Performance requirements

The CPTPP Investment Chapter prohibits Member States from imposing performance requirements such as export requirements, local content requirements and technology transfer requirements on investors.37 This aims to ensure that investors’ business activities are undisturbed by host states’ demands made in the interest of developing their economies.

Most of the requirements stipulated in the CPTPP Investment Chapter are similar to those in past investment agreements, such as NAFTA. However, the CPTPP Investment Chapter sets forth novel performance requirements in relation to the use of technology. One is the requirement to use or accord preference to a technology of the host state or a person of the host state (Article 9.10.1(h))38 and the other is the requirement to adopt certain terms as required by the host state in the technology licensing agreement freely entered into between the investor and a person of the host state (Article 9.10.1(i)).39 These provisions are expected to help investors investing in manufacturing and high-tech industries freely to make use of the technologies they develop.

These new provisions are subject to an exception that allows the host state to adopt or maintain measures to protect legitimate public welfare objectives (Article 9.10.3(h)).

Right to regulate and corporate social responsibility

Apart from emphasising the right to regulate with respect to various substantive standards of protection as indicated above, the CPTPP Investment Chapter expressly, but somewhat declaratorily,40 acknowledges that CPTPP Member States can implement measures otherwise consistent with the CPTPP Investment Chapter to ensure that investment activity is undertaken in a manner sensitive to environmental, health or other regulatory objectives (Article 9.16).

In a similar declaratory fashion, CPTPP Member States reaffirm the importance of encouraging enterprises operating in their territory to voluntarily comply with corporate social responsibility standards (Article 9.17).

iii Investor-state dispute settlement

The CPTPP Investment Chapter contains a modernised form of investment arbitration to address ISDS. This distinguishes it from NAFTA’s successor, the USMCA, which has largely abolished ISDS, or the investment agreements negotiated by the European Union, which aim to establish an investment court system.

ISDS mechanism

A claimant may submit a claim under one of the following alternatives: the ICSID Convention and the ICSID Rules;41 the ICSID Additional Facility Rules;42 the UNCITRAL Rules; or, if the claimant and respondent agree, any other arbitral institution or arbitration rules (Article 9.19.4).

When doing so, the claimant must be aware of:

  1. the mandatory six-month prior consultation and negotiation period;43
  2. the time limit of three years and six months from the date on which the claimant first acquired, or should have first acquired, knowledge of breach or damage;44
  3. the requirement of a mandatory written waiver of any right to initiate or pursue the same claims before any court or administrative tribunal, or through any other dispute settlement procedures;45 and
  4. a fork-in-the-road clause in the case of Chile, Mexico, Peru or Vietnam, which provides that an investor must elect between litigation before these states’ domestic courts or administrative tribunals, on the one hand, or an investment arbitration claim, on the other hand. The election is definitive and exclusive, and choosing the former will prevent the investor from submitting the claim to arbitration.46

Selection of arbitrators

In contrast to proposals by the European Union to replace investment arbitration with a standing investment court, parties under the CPTPP Investment Chapter continue to be able to select their arbitrators. However, the Chapter addresses perceived legitimacy concerns that arise when a system of adjudication permits adjudicators to act as arbitrator in one case and legal counsel in another (double hatting).47

On 19 January 2019, the Commission established the Code of Conduct for Investor-State Dispute Settlement Proceedings (the Code of Conduct),48 which is required under Article 9.22.6. As a countermeasure against double hatting, the general principles of the Code of Conduct require that an arbitrator, upon selection, shall refrain for the duration of the proceedings from acting as counsel or party-appointed expert or witness in any pending or new investment dispute under the CPTPP Investment Chapter or any other international agreement.49 In the event of an alleged breach of the Code of Conduct, the rules governing the arbitration shall apply to any challenge, disqualification or replacement of an arbitrator.50

Conduct of the arbitration

The CPTPP Investment Chapter offers procedural provisions to improve the efficiency of arbitral proceedings.

A tribunal shall address and decide as a preliminary question any objections by the respondent that, as a matter of law, a claim submitted is not a claim for which an award in favour of the claimant may be made under Article 9.29 (Awards) or that a claim is manifestly without legal merit (Article 9.23.4). A similar provision can be found in ICSID Arbitration Rule 41.5, but the CPTPP Investment Chapter allows a respondent to submit the above-referenced objections even in arbitral proceedings under other arbitration rules. Further, if the respondent so requests, within 45 days of it being constituted, the tribunal shall expedite a decision that such an objection (or any objection pertaining to the dispute not being within the tribunal’s competence), including an objection that the dispute is not within the tribunal’s jurisdiction. The tribunal shall suspend any proceedings on the merits, and issue a decision or award on the objection, stating the grounds for it, no later than 150 days after the date of the request (Article 9.23.5).51

Most notably, a tribunal shall, before issuing a decision or award on liability, share its proposed decision or award with the disputing parties for their comments. They may submit written comments on the proposed award on liability, which the tribunal shall consider for its decision or award (Article 9.23.10). It remains to be seen whether the party review effectively addresses tribunal oversights, or whether it will be used by the disputing parties to reargue their case.

Probably with a nod to reform efforts regarding the ISDS system being undertaken within the UNCITRAL Working Group III, the CPTPP Investment Chapter provides that if an appellate mechanism for reviewing awards rendered by ISDS tribunals is developed in the future under other institutional arrangements, the CPTPP Member States shall consider whether awards rendered under Article 9.29 should be subject to such an appellate mechanism (Article 9.23.11).

Side letter to the CPTPP

On 8 March 2018, alongside signing the CPTPP, New Zealand also signed side letters with five other signatories – Brunei, Malaysia, Peru, Vietnam and Australia – to exclude compulsory ISDS using two approaches.

The first is to fully exclude an investor’s right to ISDS. This can be seen in the side letters exchanged with Peru and Australia.52 Investors of Australia and New Zealand may nevertheless be able to draw on the ASEAN–Australia–New Zealand free trade agreement (AANZFTA) to get around this exclusion. By contrast, as of March 2021, New Zealand has no overlapping investment agreement with Peru, meaning that the exclusion of ISDS between those two states is effective.

The second approach, taken in the remaining three side letters,53 is more complex and provides for dispute resolution in stages. In the event of a dispute, an investor should make a written request for consultations and negotiations, briefly describing the facts regarding the measures at issue. The state and the investor will then try to resolve the dispute amicably within six months by using non-binding third-party procedures, including good offices, conciliation and mediation, failing which the dispute may be submitted to arbitration in accordance with the CPTPP Investment Chapter, provided that the states concerned consent (and, in the case of the Vietnam side letter, ‘specifically’ consent) to its application. However, despite the new requirement for specific host state consent, investors from those four states may be able to draw on the general consent to arbitration in a prior treaty such as AANZFTA to pursue ISDS against one of the states, even without the respondent state’s specific consent to arbitrate that dispute.

Joint declaration on ISDS

In addition to signing side letters, New Zealand made a joint declaration with Chile and Canada on ISDS. While reaffirming the right of each state to regulate within its territory to achieve legitimate policy objectives, this declaration recognises the strong procedural and substantive safeguards that are included in the CPTPP Investment Chapter, and ‘the important role of civil society and other interested groups on public policy matters relating to ISDS’, and intends ‘to consider evolving international practice and the evolution of ISDS including through the work carried out by multilateral international fora’.54

IV Conclusion

As this chapter shows, the CPTPP Investment Chapter is calibrating, not abandoning, familiar substantive and procedural investment protections.55 The contracting states have addressed current concerns about the investment protection system in an ‘evolutionary’ rather than a ‘revolutionary’ manner. This stands in stark contrast to the USMCA or the European Union’s efforts to replace the tried and tested ISDS investment arbitration with an investment court system.

It would not be surprising, therefore, if the CPTPP Investment Chapter became an inspiration for other states seeking to modernise their investment agreements in Asia and beyond.