The primary way property can qualify as QOZP in a QOF is: the property must be acquired by purchase after Dec. 31, 2017, from an unrelated party; the original use of which commenced with the QOF or the QOF substantially improved the property (by doubling the property's basis within any 30-month period after acquisition); substantially all of the use of such property is in an Opportunity Zone during substantially all of the QOF's holding period.