Blockchain Association Pushes Treasury to Clarify GENIUS Act Rules for DeFi and Foreign Stablecoins

The stablecoin market was worth about $301.5 billion on October 20, 2026, and USDT accounted for roughly 60.7% of it, according to DefiLlama. That concentration gives unusual weight to a seemingly technical question now before the US Treasury Department: when, and under what conditions, can platforms continue to make foreign-issued stablecoins available?

The Blockchain Association’s 26-page comment letter asks Treasury to narrow and clarify key terms in its GENIUS Act work, covering digital asset service providers, foreign stablecoin issuers and prohibited yield arrangements. The industry group is not simply seeking an abstract assurance of regulatory clarity. Its intervention targets the points at which implementation could determine which businesses fall within the regime, which products platforms can offer, and how quickly foreign issuers must adjust.

The definitions that determine GENIUS Act reach

The Blockchain Association’s November 4, 2025 submission asks Treasury to define the GENIUS Act’s perimeter narrowly. It urged the department to limit digital asset service providers to the entities described in Section 2(7)(A), keep the yield prohibition within Congress’s statutory language, and establish clearer pathways for smaller issuers and new entrants.

Those choices could determine which DeFi-adjacent and crypto-market businesses face the Act’s obligations and which products fall within its yield restrictions. The Association is not seeking a blanket DeFi exemption; its argument is that implementation should not add to the statutory perimeter through definitions governing platform activity and yield-related arrangements.

Treasury has said implementation must balance innovation with consumer protection, illicit-finance mitigation and financial-stability safeguards. Its September 2025 advance notice imposed no new requirements, the department said. The letter is thus aimed at the rulemaking stage, before these definitions become enforceable terms.

Foreign stablecoin access is governed by two different clocks

The foreign-stablecoin provisions make the stakes more immediate. Under the proposed framework published through the Federal Register, digital asset service providers may not offer or sell foreign-issued payment stablecoins unless the specified statutory conditions are met. That restriction applies from the Act’s effective date.

A separate, broader restriction starts later. The GENIUS Act prohibits digital asset service providers from offering or selling payment stablecoins that are not issued by permitted payment stablecoin issuers beginning July 18, 2028. The gap creates a transition period, but it does not mean foreign-issued coins face no nearer-term constraint. The earlier condition-based rule and the later general prohibition establish separate compliance clocks for platforms and issuers.

Timing is especially consequential because the statute takes effect on the earlier of 18 months after its July 18, 2025 enactment or 120 days after primary federal regulators issue final implementing regulations. Final rules can therefore bring the effective date forward relative to the outside 18-month timetable. For firms assessing product availability, issuer arrangements and compliance systems, the scheduling of rulemaking is part of the regulatory substance, not an administrative afterthought.

This is why the Association’s call for clarity on foreign issuers has a practical dimension. A platform cannot plan solely around July 2028 if the conditions governing foreign-issued payment stablecoins apply as soon as the Act becomes effective. Nor can an issuer treat the transition period as a single uninterrupted grace window when access depends on which restriction is in view.

A $301.5 billion market makes access rules material

Foreign-issuer treatment is not a drafting detail in a small or fragmented market. With stablecoin capitalization at approximately $301.5 billion and USDT representing about 60.7%, rules affecting access to foreign-issued payment stablecoins have the potential to shape platform offerings and liquidity conditions across a sizeable segment of crypto trading and settlement activity.

The available market data do not, by themselves, establish how any particular issuer would be treated under the statutory conditions or how individual platforms would respond. But the figures explain why the implementation debate has focused so intensely on availability rather than just issuer licensing. When one stablecoin accounts for a substantial share of the market, the treatment of foreign-issued coins can have effects far beyond a discrete compliance category.

The two-clock structure compounds that issue. Platforms may need to address foreign-issued stablecoin conditions from the effective date, even as the wider prohibition is scheduled for July 18, 2028. That sequencing places a premium on precise final rules: ambiguity over the conditions for continued access can force commercial decisions before the broad transition period expires.

Treasury cannot deliver all the certainty sought

The Association is right that Treasury’s definitions can materially alter the reach of the GENIUS Act. Yet Treasury cannot, by itself, remove every source of uncertainty. Implementation is distributed across Treasury, the Federal Reserve, the Office of the Comptroller of the Currency, the Federal Deposit Insurance Corporation, the National Credit Union Administration, FinCEN and OFAC, according to the Federal Register notice.

That institutional design means a restrained Treasury reading of digital asset service providers or yield restrictions would not guarantee uniform treatment across the broader implementation effort. Businesses operating around DeFi and stablecoin distribution may still have to reconcile financial, enforcement and sanctions-related rulemakings that address overlapping activity from different mandates.

It also changes the meaning of “clarity.” The industry is seeking a statutory tether for Treasury’s definitions, but the harder execution problem is consistency among regulators whose rules may meet at the same platform or transaction. The effective-date mechanism raises the pressure further: final regulations from the primary federal regulators can trigger the Act 120 days later, rather than leaving the market to rely on the full 18-month period after enactment.

Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.