As Randy asked, in what regulatory context?
I buy a condo in FL to rent to vacationers but I stay more than 14 days (and they do not have to be consecutive days) in the condo the condo is considered owner-occupied for Reg Z purposes. For a loan subject to HMDA reporting that same condo is reported as non-owner occupied.
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The opinions expressed are mine and they are not to be taken as legal advice.