The headquarters of SevCol is a large space station (officially called ICSS-1) in orbit around the Earth, at the L4 Lagrange point.
The inter-colonial space station is an intricate connection of space station modules of all official colonies, and functions as a huge embassy network of all the colonies together.
Apart from the colony-specific zones at the space station, the station is a diplomatically neutral area. It is a free-haven for everybody and all goods that fall within the SevCol rules and regulations.
The SevCol space travel certification academy (SevCol Academy) is located on ICSS-1, and The SevCol-certified marine corps, ‘Phalanx’, also has their base of command and a basic training area on the station.