Differential treatment in the UNFCCC

The document analyzes the conflict between the principle of differential treatment (CBDRRC) used in climate law and the principle of equal treatment central to international aviation law. It argues that a 'contextual treatment' approach—which differentiates based on changing national circumstances and implementation assistance—is more viable for regulating aviation emissions than the rigid binary divisions of the Kyoto Protocol. The brief notes a shift toward this approach within the International Civil Aviation Organization (ICAO) and the European Union (EU), suggesting that such flexibility is key to establishing a global market-based emissions reduction mechanism.

• Regulating international aviation emissions requires resolving the tension between the principle of differential treatment in environmental law and the principle of equal treatment in aviation law, as established by the Chicago Convention.
• International aviation emissions grew by more than 86% between 1990 and 2012, reaching 478 million tonnes of CO2, which represented approximately 1.5% of global CO2 emissions from fossil fuel combustion during that period.
• The document distinguishes between 'differential treatment norms', which grant favorable treatment to developing countries, and 'contextual treatment norms', which provide identical treatment but allow for differentiation based on varying or changing national circumstances.
• ICAO has begun to acknowledge the need for differentiation, stating that its future market-based mechanism should account for the 'special circumstances and respective capabilities of developing countries'.
• ICAO guidelines suggest specific contextual exemptions for developing states, such as those whose share of international civil aviation is below 1% of total revenue tonne kilometres, which would primarily benefit airlines in African countries.
• The European Union has shifted its approach toward differentiation; a 2014 proposal sought to exempt flights to and from developing countries with less than a 1% share of total revenue tonne kilometres, excluding high-income or upper-middle income countries like China.
• The EU and ICAO have implemented a capacity-building assistance project specifically targeting countries in Africa and the Caribbean to reduce aviation emissions through State Action Plans.

APA

Romera, B. M., & van Asselt, H. (2015). Differential treatment in the UNFCCC. Stockholm Environment Institute. https://www.sei.org/mediamanager/documents/Publications/Climate/SEI-PB-2015-International-aviation-emissions-differentiation-LR.pdf

Chicago

Romera, Beatriz Martínez, and Harro van Asselt. Differential treatment in the UNFCCC. Stockholm Environment Institute, 2015. https://www.sei.org/mediamanager/documents/Publications/Climate/SEI-PB-2015-International-aviation-emissions-differentiation-LR.pdf.

Wikipedia

{{cite report |last1=Romera |first1=Beatriz Martínez |last2=van Asselt |first2=Harro |title=Differential treatment in the UNFCCC |publisher=Stockholm Environment Institute |date=2015 |url=https://www.sei.org/mediamanager/documents/Publications/Climate/SEI-PB-2015-International-aviation-emissions-differentiation-LR.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{romera2015differential, author = {Romera, Beatriz Martínez and van Asselt, Harro}, title = {{Differential treatment in the UNFCCC}}, institution = {Stockholm Environment Institute}, year = {2015}, url = {https://www.sei.org/mediamanager/documents/Publications/Climate/SEI-PB-2015-International-aviation-emissions-differentiation-LR.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }