Union Registry

 Union Registry means that a spacecraft has been registered to the Union.

Ship registration is the process by which a ship is documented and given nationality of the Society (i.e. Union, GC, Togar Empire, Shiss Empire and etc.) that the ship has been documented to. The nationality allows a ship interstellar travel as it is proof of ownership of the vessel.

Union law requires that every civilian ship be registered in a society, called its flag state. Ship registration is similar to a person receiving a passport. A ship is bound to the law of its flag state. It is usual to say that the ship sails under the flag of the society of registration.

A ship's flag state exercises regulatory control over the vessel and is required to inspect it regularly, certify the ship's equipment and crew, and issue safety documents. The organization which actually registers the ship is known as its registry. Registries may be governmental or private agencies. In some cases, such as the Pre Astro United States' Alternative Compliance Program, the registry can assign a third party to administer inspections.

A registry that is open only to ships of its own nation is known as a traditional or national registry. Registries that are open to foreign-owned ships are known as open registries, and some of these are classified as flags of convenience.