Yesterday, the IRS provided new clarity on the process for obtaining Opportunity Fund certification:
To become a Qualified Opportunity Fund, an eligible taxpayer self certifies. (Thus, no approval or action by the IRS is required.) To self-certify, a taxpayer merely completes a form (which will be released in the summer of 2018) and attaches that form to the taxpayer’s federal income tax return for the taxable year. (The return must be filed timely, taking extensions into account.)