On June 27, 2019, the regulation for EB-5 Immigrant Investor Program Modernization (RIN: 1615-AC07) completed OMB review (Step 8 in the rulemaking process). This advances the rule toward the final rule-making step: publication in the Federal Register.
USCIS will make an announcement when the Final Rule is published in the Federal Register. You can sign up on the USCIS Federal Register Announcements page to get notified by email. The announcement could come any time now. The announcement will link to final rule text in the Federal Register.