“…Across the issue, it is clear that what a federal system "is" also differs across national contexts. At a basic level, federations can be understood as political systems that rest on a division of power between national and subnational governments, with the latter designed to embody principles of self-rule and autonomy, while the former seeks to govern matters of national interest and steer the nation as a whole (see Savage 2021;Wong et al, 2018). Power is shared, therefore, between the national government and the nation's constituent subnational units (e.g, states, territories, provinces, regions, autonomous communities), usually with an explicit division of roles and responsibilities that is defined and protected by a constitution or other legislative framework.…”