Abstract: This article asks whether inter-institutional arrangements (IIAs) can facilitate norm understandings of sustainability in the global food regime complex to ensure the implementation of SDG 2. It refers to theories of norm implementation and regime complexes and focuses on two explanatory factors: non-material resources (authority and knowledge) and interplay management (participation and interaction). The article deals with three case studies: The Codex Alimentarius Commission, the Sustainable Food Systems Programme, and the Standards and Trade Development Facility. Qualitative empirical analysis is based on documents and expert interviews. The article assumes that both explanatory factors are beneficial for the development of an aligned sustainability understanding. The findings indicate that IIAs serve as discursive fora for institutional exchange and can, thus, facilitate the development of aligned sustainability understandings in the global food regime complex. However, the article also identifies some structural factors that provide more scope for certain actors to enforce their normative views and interests, which ultimately hampers the implementation of SDG2.