You can’t convert an existing businesses into a QOZB because your QOF wouldn’t be acquiring QOZ stock or QOZ partnership interests if the business isn’t currently a QOZB or being organized for the purposes of becoming a QOZB. To the extent your business happens to meet the 5 QOZB tests, it would then be ineligible for a working capital safe harbor (WCSH) because it is not a start up business eligible for WCSH protection. You would have to create a new business that starts from scratch and performs a similar business in a QOZ that meets the 5 QOZB tests and has WCSH eligibility. As for certain industries that are not allowed, your QOZB can’t be a “sin business,” which includes golf courses, country clubs, liquor stores, hot tub facility, sun tan facility, massage parlor, racetracks and casinos.