The Interoperability Governance viewpoint models the most salient Architecture Building Blocks that refer to decisions on interoperability frameworks, institutional arrangements, organisational structures, roles and responsibilities, policies, agreements and other aspects of ensuring and monitoring interoperability at national and EU levels. As such, it does not include operational Architecture Building Blocks like interoperability agreements.
Interoperability governance is the key to a holistic approach on interoperability, as it brings together all the instruments needed to apply it.
Source: The New EIF
https://ec.europa.eu/isa2/sites/isa/files/eif_brochure_final.pdf