This article develops an understanding of authority as the ability to establish content-laden reference points that participants in legal discourse can hardly escape. Situating authority between coercion by force and persuasion through argument, it carves out recognition and constraint as constitutive elements of authority. Delegation — a conditional grant of authority from principals to agents — is typically taken to account for the authority of international courts and tribunals (ICTs). But the article argues that delegation is at best only the starting point of ICTs’ authority. The dynamics of the legal discourse stabilize authority and account for its further growth. The conception of authority that emerges from the discussion herein is...