See also: Participation Act
Fringe Worlds are worlds that do not actively participate in the running of the Union.
| Member | Description | |
|---|---|---|
| Limëan Republic | The Limëan Republic is a fringe world of the union. | |
| Corporation for intergalactic exploration of Xi | The Corporation for intergalactic exploration exploits the recently discovered hyperspace travel | |
| Lifebringer Clans | The Lifebringer Clans are a Fringe World | |
| Techno Zaibatsu | The Techno Zaibatsu is a Fringe world of the Union | |
| Inter-System Charter Company | Inter-System Charter Company is a Fringe World of the Union | |
| Unified Empire of Azaryan Colonies | Unified Empire of Azaryan Colonies is a Fringe World of the Union | |
| Embers of Aten | Embers of Aten is currently a Fringe World of the Union | |
| Unified Republic of Darya | The Unified Republic of Darya is a Fringe world of the Union |