How long is a state registration valid for and how long is a federal registration valid for? and for state I mean North Dakota if any of you know where to look for that.
- Aircraft registration issued due to renewal expires three years from the expiration date of the previous certificate.
- Aircraft registration issued to a new, import, or reinstated aircraft entering or re-entering the U.S. Civil Aircraft Register expires three years after the last day of the month in which it is issued.
State registration - if any - is up to each state so you need to check with the state where the aircraft's owner registered it.