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http://dx.doi.org/10.59704/eb4f15a5a1f0bd5e https://verfassungsblog.de/icj-climate-advisory-opinion-conferences-of-the-parties/ From Sidelines to Center Stage - Conferences of the Parties (COPs) as Legal Playmakers Rioseco, Sebastián Rao, Tejas eng 2025-09-12 electronic resource text/html ddc:342 Climate Crisis Climate Law COP customary law International Law treaty law Verfassungsblog Verfassungsblog--2366-7044 CC BY-SA 4.0 The trilogy of climate advisory opinions from the International Tribunal for the Law of the Sea, Inter-American Court of Human Rights, and the International Court of Justice marks a watershed moment not only for climate litigation but also for understanding the evolving role of Conferences of the Parties (COPs) in international law. This post analyses the courts' engagement with COPs and argues that it represents another step in clarifying their institutional role in global governance – one that elevates these treaty bodies from largely diplomatic forums to authoritative interpreters and potentially norm-creators within treaty regimes.