We pull for each "legal address". If I understand you correctly, you have a parcel of land that has several "sructures" on it, in your case they happen to be multifamily units (apartments)and I assume each unit does not have its own legal description. We would treat this no differenct than a parcel of land that had a home, barn, separate garage and other out building located on it.
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The opinions expressed are mine and they are not to be taken as legal advice.