A recent dispute involving Zimbabwe’s authorised carbon credits has drawn renewed attention to broader uncertainties in how international carbon market rules interpret and apply sovereign compliance, particularly regarding eligibility and accounting requirements under Article 6 of the Paris Agreement. The development comes as African countries prepare for the Carbon Markets Africa Summit 2026 in Kigali in October. Rwanda was among the early countries globally, and the first in Africa, to complete the full Paris Agreement carbon market compliance cycle, positioning itself as an early mover in climate finance architecture. As more African countries engage with Article 6 mechanisms, a recent dispute involving Zimbabwe’s authorised carbon credits has drawn attention to broader uncertainties in how international carbon market rules interpret and apply sovereign compliance, particularly under eligibility and accounting requirements. The development has renewed discussion among African policymakers, technical experts, and market participants on how compliance-aligned credits are recognised, valued, and integrated into global carbon market systems. ALSO READ: Rwanda, Singapore sign carbon credit deal Early implementation of Article 6 mechanisms Rwanda has been an early participant in the operationalisation of Article 6 of the Paris Agreement, which sets out rules for international carbon trading between countries. In 2023, it issued one of the first unilateral authorisations for a carbon credit under the mechanism through a Corresponding Adjustment applied to a Gold Standard-certified project. This marked an early technical milestone in translating Article 6 rules into operational practice in Africa and contributed to the development of Rwanda’s position in emerging compliance carbon markets. The country has since entered into six bilateral Article 6.2 cooperation agreements with Singapore, strengthening its engagement in structured international carbon market transactions. The country’s National Carbon Market Framework, administered by Rwanda Environment Management Authority (REMA), provides governance for both voluntary and compliance carbon market participation, including authorisation, tracking, and oversight of carbon credit activities. By December 2020, more than 2.25 million carbon credits had been issued under the framework, with 87 per cent from clean cook stove projects that aim to reduce household emissions and improve energy efficiency, according to Rwanda Climate Change Portal. ALSO READ: Carbon market: A look at Rwanda’s probable prices In February 2026, the Rwanda Cookstoves Project became among the first globally to achieve CORSIA-eligible tagging under Verra’s framework, with initial compliance transactions completed. This marked a step forward in linking voluntary market projects to compliance-oriented aviation carbon standards. The Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) is the first global, sector-specific market-based mechanism designed to address emissions from international aviation. It was developed by the UN's International Civil Aviation Organization (ICAO). What Zimbabwe’s case revels In May 2026, Zimbabwe’s government issued a statement raising concerns over the treatment of 1.6 million tonnes of authorised carbon credits under CORSIA eligibility rules. According to Zimbabwe, the credits had undergone key steps required under Article 6 procedures, including issuance of a Letter of Authorisation, application of a Corresponding Adjustment, transfer through the national registry, and submission into the Gold Standard system for trading. ALSO READ: Rwanda enters tripartite deal to cooperate on Article 6 carbon credit projects However, the credits were later ruled ineligible for CORSIA under current interpretations of rules relating to inter-registry transfers and eligibility criteria within the aviation offsetting framework. The episode has also highlighted differences in how compliance-aligned credits are valued across market pathways. Zimbabwean authorities said credits that completed the full sovereign authorisation process were trading at approximately $3 per tonne, while comparable credits using alternative insurance-backed mechanisms were trading at about $17 per tonne. It has also prompted wider discussion on the need for greater clarity, predictability, and consistency in how Article 6 credits are treated in international carbon markets. Market analysts note that pricing differences between credits reflect varying levels of risk, certification pathways, and buyer confidence. ALSO READ: Rwanda set to debut on global carbon market Evolving carbon market systems and infrastructure A key area of discussion in carbon markets is how sovereign national registries can meet technical requirements for international compliance systems such as CORSIA. These requirements include transparency, traceability, avoidance of double counting, and reliable cross-border accounting. Digital registry technologies, including blockchain-based systems, are increasingly being explored as potential tools to strengthen verification, improve auditability, and enhance interoperability between national and international carbon accounting systems. Various initiatives, including African-led efforts such as A6 Labs, are contributing to ongoing development of registry infrastructure and carbon accounting tools. These efforts are part of a broader global push to modernise carbon market systems, although adoption and standardisationremain uneven across jurisdictions. These discussions are also taking place within international aviation and carbon governance bodies, including ICAO, which is responsible for overseeing CORSIA rules and eligibility frameworks for international aviation emissions offsetting. ALSO READ: Rwanda to mobilise finance for 19 carbon market-ready projects Policy responses, regional coordination and the Kigali summit The Zimbabwe case has contributed to ongoing policy discussions on how international carbon market frameworks could evolve to provide clearer and more consistent treatment of sovereign-authorised credits under Article 6 of the Paris Agreement. These discussions include potential options such as refining technical standards for registries, improving interoperability across systems, clarifying eligibility conditions for inter-registry transfers, and strengthening coordination between participating countries and international standard-setting bodies. Rwanda, alongside other African countries engaged in Article 6 implementation, should play a major role in broader international dialogues on carbon market governance, with growing emphasis on ensuring predictability and credibility in market rules. The country is also expected to host the Carbon Markets Africa Summit 2026 in Kigali, which could provide a platform for regional engagement on carbon market cooperation, technical alignment, and policy coordination. ALSO READ: Rwanda to mobilise finance for 19 carbon market-ready projects Near-term considerations in carbon market rules Current CORSIA rules do not explicitly prohibit inter-registry transfers, although they include conditions that influence how such transfers are assessed under eligibility criteria. Interpretation of these provisions varies depending on the certification pathway and registry arrangements involved. As a result, crediting programmes retain some discretion in how authorised credits are evaluated within existing frameworks, particularly where multiple standards and systems intersect. This has contributed to ongoing discussions among stakeholders on the need for clearer guidance to support consistency, transparency, and predictability in credit recognition, especially for sovereign-issued credits. The Zimbabwe case underscores ongoing policy discussions on how carbon markets can evolve to ensure greater clarity, consistency, and fairness in the recognition of Article 6-aligned credits, while supporting broader participation by African countries in global climate finance mechanisms.
