Legal Considerations of Bilateral Investment Treaties in the Negotiation and Implementation of International Environmental Agreements Strategies

Ashraf M. A. Elfakharani

Taif University, Saudi Arabia

International Investment Agreements (IIAs) are increasingly scrutinized for their constraints on state regulatory power, yet scholarly and policy discourse remains stalled between entrenched critiques and abstract reform proposals. This article moves beyond this impasse by conducting a systematic doctrinal analysis of a new generation of “recalibrated” IIAs and arbitral awards to construct a legally enforceable framework for integrating economic and social justice policies. Employing a mixed-methods approach, combining critical legal analysis of treaty texts (CETA, USMCA, Morocco-Nigeria BIT) with a granular review of post-2015 ISDS jurisprudence, we identify a nascent but inconsistent jurisprudential shift. Tribunals in cases like Rockhopper v. Italy are increasingly invoking multilateral environmental and human rights norms under VCLT Article 31(3)(c), while others perpetuate a pro-investor stance. We argue that this inconsistency stems not from a lack of tools, but from the under-theorization of their application. Building on recent scholarship on ESG in investment law (Chaisse 2024; Bueno et al. 2023; Hodgson et al. 2025), we propose a novel BHR-ESG Integration Framework, which operationalizes “balance” through three legally precise mechanisms: (1) Tiered ISDS Access, differentiating between fossil fuel and renewable energy investments; (2) Procedural Reversal Mechanisms, shifting the burden of proof for measures implementing MEAs; and (3) Embedded CSR Obligations linked to host-state domestic laws, moving beyond aspirational clauses. Grounding reform in existing arbitral trends and treaty innovation, this article provides an actionable pathway for negotiators and arbitrators to turn IIAs from instruments of constraint into catalysts for equitable and sustainable development.

Article link: https://www.asianinstituteofresearch.org/lhqrarchives/legal-considerations-of-bilateral-investment-treaties-in-the-negotiation-and-implementation-of-international-environmental-agreements-strategies