Summary:
The Paris Agreement establishes a framework for climate action centred on Nationally Determined Contributions (NDCs). The term “nationally determined” affirms state sovereignty in climate action decision-making while requiring substantive analysis and planning from each party. While countries maintain significant discretion in determining their contributions, this discretion operates within the broader framework of the Agreement, including its temperature goals and the principle of common but differentiated responsibilities.
The framework for NDCs has been further developed through subsequent decisions. The Katowice Guidance (Decision 4/CMA.1) provides comprehensive structure for NDC development, including detailed requirements for information clarity, transparency, accounting approaches, and implementation timeframes. The Glasgow Decision (6/CMA.3) built upon this by establishing common timeframes for NDC submissions.
NDCs must fulfil several mandatory procedural requirements. These include successive communication without gaps, adherence to a five-year communication cycle, recording in a public registry, and regular implementation reporting. Substantively, NDCs must represent progression from previous submissions, reflect the highest possible ambition, include clear and transparent information, be anchored in domestic measures, and follow agreed accounting principles.
The Agreement recognizes different national circumstances through differentiated expectations. Developed countries are expected to adopt economy-wide absolute emission reduction targets, while developing countries are encouraged to move toward economy-wide targets over time. Special flexibility is provided for Least Developed Countries (LDCs) and Small Island Developing States (SIDS).
While countries maintain broad authority in determining implementation approaches, this discretion operates within defined boundaries. NDCs cannot regress from previous submissions and must represent a progression, must align with the Agreement’s temperature goals, must provide required information for transparency, and must participate in regular review processes. The transparency framework and accountability mechanisms ensure that national discretion balances with international climate action objectives.
This legal framework represents a careful balance between respecting national sovereignty and maintaining an effective international response to climate change. It provides countries with flexibility in determining their contributions while ensuring these efforts collectively advance the Agreement’s goals through clear procedural requirements and substantive expectations.