The First is the name given to the empire of The Second. It is often referred to as "the empire" by its members.
High social station in The First is not reserved to The Second, but they do tend to fill leadership roles with much greater frequency than other species.
The First's territory spans from the Great Rift to Alpha Crucis, with frontier extensions Rimward.
The First controls its constituent worlds through their starports, which fall under jurisdiction of The First. These starports have a separate law level (1) from the constituent world and tend toward tech level 12, unless a higher level is locally available.
The First establishes yearly quotas of hosts that each member world must provide for The Second, based on a flat percentage of its population. The percentage varies from world to world depending on the majority species of sophont.
The First maintains a common currency, the credit and regulates its use.
The First maintains standardized regulations for electronic, power, and mechanical system compatibility.
The First maintains databases of Universal World Profiles, Universal Person Profiles, and Universal Host Profiles.