Investment Treaty & Sovereign Dispute Arbitrator
HARSHAVARDHAN SANCHETI
SECTOR — INVESTMENT TREATY & SOVEREIGN DISPUTES
Investment Treaty & Sovereign Dispute
Arbitrator
International arbitration specialist for investor-state disputes across bilateral investment treaties, multilateral investment frameworks, the Energy Charter Treaty and state contract arbitrations covering expropriation, fair and equitable treatment, national treatment, full protection and security, umbrella clause and denial of justice claim under ICSID, UNCITRAL, PCA, ICC and SCC Rules across all major investment jurisdictions.
ABOUT THIS PRACTICE
Independent arbitrator for the full spectrum of investor-state and sovereign disputes
Investment treaty arbitration is the most demanding form of international dispute resolution. An arbitrator in this field must be conversant with treaty interpretation under the Vienna Convention, the evolving standards of customary international law and the procedural architecture of ICSID, UNCITRAL and PCA proceedings while also understanding the commercial and political realities that underlie every investor-state dispute.
Harshavardhan Sancheti accepts appointments as sole arbitrator or tribunal member in investment treaty and sovereign disputes, BIT claims, ECT proceedings, NAFTA/CUSMA Chapter 11 arbitrations, state contract disputes and regulatory expropriation cases. His appointment as Special Legal Consultant at ICSID at the World Bank Group, his service as Tribunal Secretary and Assistant to Prof. Jan Paulsson in ICSID proceedings and his years as counsel at Three Crowns LLP and Dechert LLP representing sovereigns, state enterprises and Fortune 500 investors in proceedings exceeding USD 5.4 billion, place him in an unusually well-prepared position to serve as a neutral decision-maker in this field.
Appointments are accepted under ICSID Convention Rules, ICSID Additional Facility Rules, UNCITRAL Rules, PCA Rules, ICC Rules and all leading institutional and ad hoc frameworks. Conflict-check requests from parties, counsel and institutions are welcome.
Arbitral Institutions
- ICSID
- UNCITRAL / PCA
- ICC
- LCIA
- SIAC
- SCC
- DIAC
- HKIAC
- AAA-ICDR
PRACTICE AREAS
Investment treaty and sovereign disputes handled
The full spectrum of investor-state arbitration from BIT expropriation to state contract disputes and sovereign regulatory measures under any applicable treaty and governing law.
BIT Expropriation Claims
Direct and indirect expropriation claims under bilateral investment treaties covering outright nationalization, creeping expropriation through regulatory measures, forced divestiture, revocation of licences and permits and state interference with corporate control. Includes analysis of the legality, public purpose, non-discrimination and compensation requirements under customary international law and treaty standards.
Direct expropriation · Indirect / creeping expropriation · Licence revocation · Forced divestiture · Compensation quantum
Fair & Equitable Treatment
FET claims under BITs and multilateral treaties covering breach of legitimate expectations, denial of justice, lack of due process, arbitrary and discriminatory state conduct, and failure to provide a stable and transparent legal framework. The FET standard is invoked in the majority of ICSID proceedings and is the most frequently litigated treaty protection standard globally.
Legitimate expectations · Denial of justice · Arbitrary state conduct · Transparency obligation · Due process breaches
Energy Charter Treaty Claims
Investor-state arbitration under the Energy Charter Treaty (ECT) covering expropriation of energy assets, FET breaches arising from subsidy changes and regulatory reforms, and umbrella clause claims. Despite the EU’s 2025 withdrawal, the ECT’s 20-year sunset clause preserves existing investor rights, sustaining a substantial pipeline of claims.
ECT Article 10 FET claims · ECT Article 13 expropriation · Sunset clause proceedings · Energy subsidy disputes · Renewable energy ECT claims
NAFTA / CUSMA & FTA Claims
Investor-state arbitration under NAFTA Chapter 11, its successor CUSMA Chapter 14, and bilateral and multilateral free trade agreements covering minimum standard of treatment, expropriation, performance requirements and investor protections under CAFTA-DR, CPTPP, ASEAN investment frameworks and other modern FTAs.
CUSMA Chapter 14 · NAFTA Chapter 11 legacy · CAFTA-DR claims · CPTPP investor protection · FTA minimum standard
State Contract & Sovereign Commercial Disputes
Arbitration of state contracts between foreign investors and host states or state enterprises concession agreements, production sharing contracts, host government agreements and sovereign commercial contracts where a state party’s breach may give rise to both contractual and treaty claims in parallel.
Concession agreements · Host government agreements · PSC / PSA disputes · Parallel treaty claims · State enterprise commercial disputes
Sovereign Regulatory Measures
Claims arising from legislative or regulatory measures that affect protected investments windfall taxes, changes to mining or energy codes, environmental moratoriums, local content requirements and price control regimes assessed against FET, expropriation and national treatment standards under applicable treaties.
Windfall tax measures · Regulatory taking claims · Local content requirements · Price control disputes · Environmental moratoriums
MFN, National Treatment & Full Protection
Claims under the most-favored-nation, national treatment and full protection and security standards in BITs and multilateral investment frameworks including MFN importation of dispute resolution provisions, discriminatory tax treatment and state failure to protect investors from third-party interference.
MFN clause disputes · National treatment claims · Full protection & security · Discrimination claims · MFN in dispute resolution
ICSID Annulment & Award Enforcement
Proceedings before ICSID Ad Hoc Committees on annulment grounds under Article 52 of the ICSID Convention manifest excess of powers, serious departure from fundamental rules, failure to state reasons. Also covers enforcement of ICSID and non-ICSID awards against sovereign states, including asset tracing and attachment proceedings in multiple jurisdictions.
ICSID annulment · Article 52 grounds · Excess of powers · Award enforcement · Sovereign asset attachment
GEOGRAPHIC REACH
Key investment treaty jurisdictions & seats
Investment treaty arbitration is concentrated in identifiable geographic hotspots Eastern Europe and Central Asia, Latin America, Sub-Saharan Africa, South Asia and the Middle East account for the overwhelming majority of ICSID caseload. Deep familiarity with each region’s treaty landscape, regulatory framework and dispute history is what separates a specialist from a generalist.

United States
ICSID • UNCITRAL • PCA • AAA-ICDR

Africa — Sub-Saharan & West Africa
ICSID • UNCITRAL • PCA • OHADA

Latin America — Ecuador, Venezuela, Mexico, Peru, Chile
ICSID • UNCITRAL • PCA • CIADI

Eastern Europe & Central Asia — Croatia, Ukraine, Kazakhstan, Russia
IICSID • SCC • PCA • UNCITRAL

Croatia, Ukraine, Kazakhstan, Russia
ICSID • SCC • PCA • UNCITRAL

India
ICSID • UNCITRAL • PCA • MCIA

Nigeria & West Africa
ICSID • UNCITRAL • PCA • ICC

UAE & Middle East
ICSID • DIAC • UNCITRAL • ICC
INSTITUTIONS & RULES
Where appointments are accepted
Deep procedural expertise in every major investment treaty arbitration forum from ICSID Convention proceedings to UNCITRAL ad hoc arbitrations and institutional proceedings under PCA, ICC and SCC Rules.
| INSTITUTION | RULES | ISDS STRENGTHS | KEY CLAIM TYPES |
|---|---|---|---|
| ICSID – International Centre for Settlement of Investment Disputes | ICSID 2022 | World’s leading ISDS forum; self-contained enforcement under the ICSID Convention; annulment mechanism; no domestic court interference | BIT expropriation claims, ECT disputes, state contract disputes, resource nationalism, regulatory takings |
| PCA – Permanent Court of Arbitration | UNCITRAL 2013 | Administers UNCITRAL Rules for investor-state disputes; suited for intergovernmental parties; commonly used where ICSID jurisdiction is unavailable | BIT arbitration, UNCITRAL investor-state disputes, state-to-state proceedings, energy-sector sovereign claims |
| ICC – International Court of Arbitration | ICC 2021 | Used for parallel commercial and treaty claims; multi-party proceedings; scrutiny of awards; Terms of Reference procedure | Oil and gas tax disputes, parallel treaty and contract claims, sovereign commercial arbitration |
| SCC – Stockholm Chamber of Commerce | SCC 2023 | Prominent forum for ECT disputes; strong Russia, CIS and Eastern Europe expertise; expedited procedure available | ECT claims, Eastern European BIT disputes, Nordic state disputes, energy-sector sovereign measures |
| LCIA – London Court of International Arbitration | LCIA 2020 | Strong English law expertise; sovereign commercial disputes; emergency arbitrator provisions; confidential proceedings | Sovereign debt disputes, state enterprise commercial arbitration, UK-related BIT claims |
| SIAC – Singapore International Arbitration Centre | SIAC 2025 | Asia-Pacific investment disputes hub; ASEAN-focused claims; expedited procedure; strong international enforceability | ASEAN BIT claims, India-ASEAN investment disputes, Asian sovereign infrastructure disputes |
| HKIAC – Hong Kong International Arbitration Centre | HKIAC 2024 | Gateway for China-related investment disputes; Belt and Road Initiative expertise; strong Mainland China enforcement framework | China-linked BIT claims, BRI investment disputes, PRC state enterprise arbitrations |
| DIAC – Dubai International Arbitration Centre | DIAC 2022 | MENA-focused seat; Gulf sovereign disputes; DIFC courts enforcement; GCC state contract expertise | GCC state contract disputes, MENA investment arbitration, UAE-related BIT claims |
| AAA-ICDR | ICDR 2021 | North American treaty arbitration expertise; FAA-backed enforcement; strong US investor-state dispute framework | NAFTA Chapter 11 claims, CUSMA investment disputes, US-linked BIT arbitrations |
HOW IT WORKS
How an investment treaty arbitration is conducted
From accepting appointment to issuing a final award, a rigorous, commercially informed process built around the procedural and substantive demands of investor-state arbitration.
01
Accepting Appointment
The dispute clause, conflict check and proposed terms of appointment are reviewed and acceptance as sole arbitrator or tribunal member promptly confirmed.
01
Case Management
Jurisdictional objections, bifurcation requests and preliminary procedural timetables are addressed at the outset, with efficiency and commercial urgency in mind.
03
Hearing & Submissions
Document production, witness statements, expert evidence on quantum and applicable law are managed with rigour, drawing on direct experience of how tribunals approach ICSID and UNCITRAL proceedings.
04
Deliberation
Evidence and legal submissions are analyzed with independent judgement, informed by deep familiarity with BIT standards, customary international law, and investment treaty jurisprudence.
05
Award & Enforcement
A reasoned, enforceable award is issued. Enforcement routes under the ICSID Convention and the New York Convention across 172 states are navigated where required.
This document is for informational purposes only and does not constitute legal advice. Engaging the services of Harshavardhan Sancheti requires a formal engagement agreement.
Facing an investment treaty or sovereign dispute
Submit an enquiry to discuss appointment as sole arbitrator or tribunal member.