When the U.S. Treasury closed the comment window on its payment-stablecoin rule on October 19, it did not finish the rule. It finished the input stage. The proposed regulation, a new 12 CFR Part 1523, remains exactly that: proposed. What has already started running is the statutory clock the rule is meant to implement, and that mismatch, not the proposal’s content, is the part of this story worth watching.
Two documents, two different statuses
It helps to keep the statute and the rule apart. The GENIUS Act, enacted July 18, 2025, is already law. Its Section 3 sets the boundaries of who may issue, offer, or sell a payment stablecoin in the United States. The Treasury proposal, docketed as TREAS-DO-2026-0496 under RIN 1505-AC95, is the agency’s attempt to translate Section 3 into operational text. It splits its work across five sections plus an interpretive appendix: definitions, an issuance prohibition, offer-and-sale rules for digital asset service providers, exemptions and safe harbors, and a severability clause.
The definition is the load-bearing piece. A payment stablecoin is a digital asset used, or designed to be used, as a means of payment or settlement, whose issuer must convert, redeem, or repurchase it for a fixed amount of monetary value. That framing deliberately leaves investment tokens outside the rule and tells foreign issuers they are inside its reach: Treasury states the part is intended to apply extraterritorially when a foreign issuer offers or sells to someone located in the United States.
Two clocks, two effective dates
The deadlines are staggered on purpose. Section 3(b)(2) applies to foreign-issued payment stablecoins on the Act’s effective date, January 18, 2027, eighteen months after enactment. That is the nearer clock, and the one the October 19 comment deadline just fed. Section 3(b)(1), by contrast, gives digital asset service providers until July 18, 2028, three years after enactment, to ensure every stablecoin they list comes from a permitted issuer. Between those two dates, an exchange can face the foreign-issuer rule months before the broader listing rule takes effect.
The enforcement backstop sits in Section 3(a), which bars anyone other than a permitted issuer from issuing a payment stablecoin. Knowing participation in a violation carries a fine of up to $1 million for each violation, up to five years’ imprisonment, or both. The phrase for each violation matters: a series of unlawful issuances compounds rather than resetting.
What the gap does and does not resolve
The proposal is not the final rule, and Treasury has not said when a final rule will appear. Issuers are therefore preparing to comply with a statutory scheme whose binding operational text is still being written. The proposal does name its relief valves: safe harbors for de minimis transaction volume and for unusual and exigent circumstances, a twelve-month waiver available to qualifying subsidiaries of insured depository institutions, and a carve-out for person-to-person transfers, transfers between a person’s own accounts, and self-custody activity.
None of that pauses the clock. A final Treasury rule, the OCC’s issuer-licensing rule, and the comparability determination a foreign issuer needs to stay in the U.S. market all remain unpublished. For issuers and platforms, the practical question is no longer what the proposal says, but whether the final text and the licensing machinery around it can land before the dates already set in statute.
Adapted from GENIUS Act Stablecoin Rule Comment Window Closes With 91 Days to the Effective Date.