The general rule is that such proceeds will not be a good asset (i.e., qualified opportunity zone property) for purposes of the 90% asset test. But if the property sold was qualified opportunity zone property, then the proceeds will be treated as a good asset for purposes of the 90% asset test, if the following requirements are met: (i) the QOF reinvests the proceeds in qualified opportunity zone property within 12 months of the sale, and (ii) before they are reinvested, the proceeds are continuously held in cash, cash equivalents, or debt instruments with a term of 18 months or less.