The central debate in digital asset policy used to bewhether to regulate at all. That question is now settled. MiCA's transitionalperiod ended July 1st, 2026; the UK finalized its cryptoasset rulebook on June30th; the US celebrated the one-year anniversary of theGENIUS Act becoming law; and the SEC and CFTC issued joint guidance inmid-March that classified many digital assets as digital commodities.What now keeps industry participants and policymakers up atnight is whether rules written in Washington, London, and Brussels caninteroperate and work alongside one another.Where We AreThe end of MiCA's transitional period triggered a majorshakeout in the European market. Of the more than 1,200 firms previouslyoperating under national frameworks, only around 244 secured authorization. TheUK's full regime goes live in October 2027, while in the US, perpetual futureswere brought onshore in May 2026, the GENIUS Act takes effect in January 2027,and negotiators continue work to finalize and pass the CLARITY Act.Recently, the Transatlantic Taskforce for Markets of theFuture issued a joint US-UK statement affirming stablecoins as an importantvehicle for innovation in digital money and committed to working together todevelop clear, consistent regulatory pathways forward to enable stablecoins toflourish between the two jurisdictions.In a first for digital assets policy, two of the world'smajor financial jurisdictions are developing interoperable and convergentframeworks designed to enable and promote digital asset-based finance. Thatconsensus is new, and it matters.However, agreeing that something belongs inside the perimeterisn't the same as building one that works across borders. Take a stablecoinissued in the UK, held by a customer in the EU, and used to settle atransaction with a US institution. The transaction may happen almost instantly,but the rules covering reserves, redemption, custody, reporting, and insolvencystill sit across three separate systems.The goal shouldn't be identical rules everywhere. We shouldaim to make sure different regimes offer broadly comparable protections andrecognize regulated activity taking place elsewhere.Why Frameworks Alone Are Not EnoughHaving frameworks in place and having frameworks that worktogether are different things. The technology hasn't slowed down whilelegislation was being written. DeFi, tokenization, and agentic payments aremoving from experiment to infrastructure.Each jurisdiction built its framework for its own market,legal system, and political moment, producing serious rulebooks that are notdesigned to talk to each other.Stablecoins illustrate this most sharply. Issuers facedifferent rules on what counts as reserves, where those reserves are held, howquickly customers can redeem, and what happens if the issuer fails. Thesedifferences are manageable for a single-market issuer. They become structuralproblems the moment a stablecoin crosses borders.Making regimes work together doesn't mean erasing thosedifferences. It means agreeing that reserves are available, customers canredeem, assets are protected, and regulators know who's responsible ifsomething goes wrong.The networks moving tokenized assets are global, while thefirms using them remain accountable to national regulators. The challenge iskeeping that accountability without adding friction every time an asset crossesa border.What Happens If We Get This WrongThe consequences fall across three areas, and none areabstract.For firms, the cost compounds. Running separate legal,compliance, and reporting structures suppresses the ability for firms toquickly scale and pushes businesses toward whichever market is easiest tonavigate, including those markets with no regulatory frameworks in place. Forinstance, MiCA's compliance burden falls disproportionately on smaller firms,which face many of the same requirements as much larger exchanges.For the financial system, fragmentation blurs the fullpicture. One regulator may oversee the issuer, another the reserves, anotherthe platform. If regulators aren't already working together, especially in adomestic capacity, let alone international interoperability, responding to amarket failure or stress becomes significantly harder - the costs of which canbe immense.For economies, investment flows toward markets offering bothregulatory clarity and access. The inability to bridge regulatory distinctionsbetween markets will affect how capital moves and where it moves. The countriessetting the standards now will shape the rules for the next era of financialmarkets, which is why the establishment of the Taskforce and the recentstatement are so critical to building this next era underpinned by democraticvalues.What Needs to HappenThe tools for interoperability already exist. The EUdemonstrated that a single rulebook can work across 27 countries. The UShas created a federal framework for payment stablecoins and begunclarifying the roles of its main market regulators. The UK built the DigitalSecurities Sandbox, the only live supervised testing environment for digitalsecurities anywhere in the world.Three things can happen now, without new laws.First, governments need a clearer process for deciding whenanother jurisdiction’s rules offer comparable protections. The GENIUS Act letsforeign stablecoin issuers operate in the US where theTreasury Department judges their home rules comparable. The UK and USshould use the Transatlantic Taskforce to agree on what that comparison coversas a basis for determinations by the Stablecoin Certification Review Committee,including on the topics of reserves, redemption, safeguarding, reporting, and financialcrime controls, and bring other major markets into the discussion.Second, regulators need practical arrangements forsupervising cross-border activity. Common definitions help, but aren't enough.Authorities need clear channels for sharing information, coordinatingenforcement, and deciding who leads if an issuer fails.Just released - ABA and 52 state banking associations urge @USTreasury to uphold GENIUS Act's ban on stablecoin interest: https://t.co/2P2jelAuAg— American Bankers Association (@ABABankers) November 4, 2025The March 2026 jointSEC-CFTC guidance shows what interoperability looks like. The FinancialStability Board has done the groundwork. What's missing is turning thoseprinciples into working arrangements.Third, start with what’s already working. The UK's DigitalSecurities Sandbox should be the starting point for jointly supervised testingof cross-border activity. HSBC was the first firm approved to go live in theSandbox this month, operating as a digital securities depository for bondissuance and settlement. That kind of real-world proof of concept does more forconfidence than any number of consultation papers—the question now is whethersupervised activity can extend across borders, not just within them.The competition of the past five years produced theframeworks we now have. Coordinating on frameworks that each country builtindependently and takes pride in is hard. The alternative is three serious,well-built systems that cannot work together and that serve no one.The pieces are there. Global policymakers will need toconnect them.This article was written by Nilmini Rubin at www.financemagnates.com.