Sovereign Class

In the outer belt, three billion people exist in a legal gray zone. Born on stations and ships, classified as contracted labor rather than citizens, they work the jobs nobody else will take under corporate charters that define every aspect of their lives. They have never been to Earth. They never will be. When a systems engineer on a remote belt station finds a gap in the interplanetary administrative framework that nobody was supposed to find, she spends four years deciding what to do about it.
Then she does it. At 0215 on a Tuesday morning, Halfway Station quietly reclassifies itself as an independent sovereign nation using a legal provision that has sat untouched for forty years. What nobody on Earth expects is that forty other stations were watching. All of them had the same mechanism ready. All of them execute it simultaneously the moment Earth's fleet moves toward the first station.
Forty declarations. Three billion people. One legal framework that the corporations helped write and never imagined being used against them. Earth cannot fight forty wars at once and the outer belt knows it. But independence without supply lines is a slower way to die, and the corporate fleets are already moving to let them starve back into compliance. What follows is a collision between four people who will determine whether the declarations survive, a belt engineer who built the door, a government analyst who understands the law better than anyone wants him to, a corporate executive who has to decide what the next thirty years look like, and a freight hauler who belongs to nobody and ends up carrying everything.