Free Planets Alliance National Assembly
From Gineipaedia, the Legend of Galactic Heroes wiki
The Free Planets Alliance Assembly functioned as the legislative branch of the Free Planets Alliance government, alongside the executive branch and the courts. (Legend of Galactic Heroes Volume 1: Dawn)
Known districts of the Assembly include:
Settled planets within the alliance appear to correlate 1:1 legislative districts. The Assembly also appears to be unicameral, though it is possible that different districts have different numbers of representatives based on population.