The OCC finalized its GENIUS Act rules for stablecoin issuers today, Oct. 21, 2026, according to Cointelegraph and Bitcoin Archive. The posts describe the package as covering reserves, redemptions and custody for issuers plus custody rules. The rules are effective Jan. 18, 2027, per both posts and the Leviathan headline. AML and sanctions rules were deferred to Treasury, per Bitcoin Archive. I could not verify the full OCC text from the supplied links, so specifics beyond reserves, redemptions, custody and the Jan. 18, 2027 date remain unconfirmed in these sources.