How is the structure of the General Assembly determined?

The structure of the General Assembly is primarily determined by state constitutions. Each state in the U.S. has its own constitution that outlines the framework and organization of its legislative body, including the number of chambers, the powers and responsibilities of those chambers, and the election processes for state legislators. This state-specific approach allows for variations in how legislative bodies operate across the country, reflecting the unique needs and preferences of each state's populace.

While federal law does set certain parameters for elections and legislative procedure, it does not dictate the specific structure of individual state legislatures. Popular vote relates to how legislators are chosen but does not encompass the overall structure itself. Gubernatorial decrees do not play a role in establishing the foundational organization of the General Assembly; instead, they may influence legislation or policy decisions after the structure is set by the constitution.