70% or more of tangible property of the Opportunity Zone business has to be qualified Opportunity Zone property. The business has to generate more than 50% of its gross income from inside a qualified Opportunity Zone. No more than 5% of the businesses assets can be "nonqualified financial property," including cash or cash equivalents unless holding them pursuant of a written plan and the money will be spent within 31 months of receipt by the Opportunity Zone business. Lastly, the Opportunity Zone business cannot be engaged in a "sin" business.