I am not a DAR and thus my original question. With that said my research into this stated that once a registration has expired (regardless of reason) for more than 90 days the n-number is on hold and unavailable for 5 yrs. I could find no mention of registering the number again during this time regardless of who was trying to do it. That brought me to the AW cert and whether or not a whole new AW inspection was needed.