olemus
kodakondsuse analoog muu kui isiku
(näiteks firma, laeva või lennuki) kuuluvusena

Dictionary.com:
2. the relationship of property, holdings, etc., to a particular nation, or to one or more of its members:
the nationality of a ship

ülevaateid
https://lawexplores.com/nationality-of-corporations-and-assets/

https://www.quora.com/How-can-one-decide-the-nationality-of-a-corporation

https://en.wikipedia.org/wiki/Ship_registration

https://en.wikipedia.org/wiki/Flag_state

https://unitingaviation.com/news/safety/aircraft-nationality-and-registration/

https://en.wikipedia.org/wiki/List_of_aircraft_registration_prefixes