You can't really apply for an exception. However, there are two techniques that can reduce or eliminate the penalty. One is the 31 months can be extended by any delays due to government approval time. The second is the value of improvements are not just the cost of improvements, but the value of the improvements. If you are close, get a new appraisal on the value of tangible assets. The new appraisal may show that the value of tangible assets has doubled and the original assets plus improvements are now all Qualified Opportunity Zone assets. The related land also is now considered a Qualified Opportunity Zone asset. The penalty is calculated as follows for a 90% test penalty example. Total assets $50,000,000. 90% of Assets are $45,000,000. Total qualified assets $40,000,000. There is a $5,000,000 shortfall. The monthly penalty is $20,833.33, $5,000,000 X (5% /12). If there is a penalty, the shortfall will be recalculated each month. Note, the rate is 3% plus fed short-term rate. At time of writing, the rate is 5%.