MiCA Stablecoin Rules: ART and EMT Compliance Framework

Stablecoin regulation was the animating concern behind MiCA’s creation. The Libra/Diem project’s 2019 announcement catalyzed EU regulatory urgency; the TerraUSD collapse in May 2022 — which destroyed approximately $40 billion in value within 72 hours — provided the political mandate to establish hard reserve requirements and supervisory teeth. MiCA’s stablecoin provisions, contained in Titles III (ARTs) and IV (EMTs), reflect both concerns: they impose rigorous authorization requirements, mandatory reserve asset segregation, and intervention powers that can restrict stablecoin usage at scale in the EU.

The ART/EMT Distinction: Why It Matters

The classification of a stablecoin as an ART or an EMT determines not only the applicable regulatory framework but the licensing pathway entirely. These are not parallel tracks with similar requirements — they are fundamentally different regulatory regimes.

An e-money token (EMT) is pegged to a single official currency. Its issuer must be an authorized e-money institution or credit institution. The EMI licensing framework under Directive 2009/110/EC is well-developed across the EU, with a clear authorization pathway and harmonized prudential requirements. EMT regulation is, in effect, e-money regulation applied to a blockchain-based instrument.

An asset-referenced token (ART) is pegged to a basket of assets — which may include multiple currencies, commodities, or other rights. ART issuers need not be EMIs or credit institutions; they obtain authorization specifically under MiCA Title III from an NCA. The reserve requirements for ARTs are more complex, reflecting the multi-asset stabilization mechanism.

ART Authorization Process

An entity wishing to issue an ART in the EU must apply to the NCA of its home member state (or, for entities established outside the EU, through an EU-incorporated entity). MiCA Article 18 specifies the authorization requirements.

The application must include:

Business plan and financial model: Demonstrating the projected volume of tokens in circulation, the reserve asset composition, and the financial viability of the issuer.

Whitepaper: Drafted in accordance with MiCA Annex II and pre-approved by the NCA. The ART whitepaper approval process is more rigorous than the self-certification process for other crypto-asset whitepapers.

Legal analysis: Confirming that the token qualifies as an ART and is not a financial instrument, EMT, or other regulated product.

Governance documentation: Describing the management body, ownership structure, and internal control framework.

Reserve asset management policy: Describing how reserve assets will be composed, managed, custodied, and rebalanced.

Complaints handling procedures: Including the independent review mechanism required by MiCA Article 31.

The NCA has 60 working days from receipt of a complete application to grant or refuse authorization. For ART applications involving potential systemic significance, the EBA must be consulted.

Reserve Requirements: ARTs

MiCA Article 35 establishes the reserve asset framework for ARTs. The reserve must:

At all times cover the value of tokens in circulation: The market value of the reserve assets must equal or exceed the outstanding value of ART tokens. The calculation methodology must be specified in the whitepaper and approved by the NCA.

Be composed of low-risk, liquid assets: MiCA Article 36 specifies that reserve assets must be invested in highly liquid financial assets with minimal market and credit risk. Eligible assets include cash deposits at credit institutions, highly liquid debt instruments issued by EU sovereign issuers, and — up to a maximum proportion — units in regulated money market funds.

Be segregated from the issuer’s own assets: Reserve assets must be held by a custodian that is independent of the ART issuer. The custodian must be an authorized credit institution or CASP providing custody services.

Not be lent or pledged: MiCA prohibits ART issuers from pledging or lending reserve assets. This prohibition applies absolutely — there is no carve-out for over-collateralized lending or yield-generating strategies on reserves.

Be subject to stress testing: ART issuers must conduct regular liquidity stress tests and submit results to the NCA. Significant ART issuers must also submit results to the EBA.

EMT Requirements

EMT issuers face a simpler but no less rigorous framework, anchored in the pre-existing e-money regulatory regime.

Licensing prerequisite: The issuer must be authorized as a credit institution under Directive 2013/36/EU or as an e-money institution under Directive 2009/110/EC before issuing EMTs. This sequencing is non-negotiable. An entity cannot issue EMTs while its EMI application is pending.

Reserve equivalence: EMT reserve requirements mirror those under 2EMD: issued EMTs must be backed 1:1 by fiat currency reserves held in segregated accounts at credit institutions. The EMT issuer cannot invest reserves in assets with credit or market risk beyond what is permitted under 2EMD.

Redemption rights: EMT holders have a legal right to redeem their tokens at par value — the face value of the pegged currency — at any time. This right cannot be restricted or deferred. The ability to honor redemption at scale is therefore a core prudential concern.

Whitepaper requirement: EMT issuers must publish a whitepaper compliant with MiCA Annex III. Unlike ART whitepapers, EMT whitepapers are not subject to NCA pre-approval — they are notified to the NCA and published.

Significant ART and EMT Designation

The EBA, in consultation with ESMA and the relevant NCA, designates ARTs and EMTs as “significant” based on the following criteria (two of six must be met):

1. The token has more than 10 million holders
2. The value of tokens in circulation exceeds €5 billion
3. The number of transactions per day exceeds 2.5 million or the daily transaction value exceeds €500 million
4. The token is used as a means of exchange in multiple member states
5. The degree of interconnectedness with the financial system is significant
6. The token or its issuer are of significance with respect to the activity of third parties providing services related to the token

Consequences of significant designation:

• Capital requirement increases to 3% of the average reserve asset amount (vs. minimum capital for standard issuers)
• Enhanced liquidity management and stress testing obligations
• Interoperability requirements with other payment systems
• Mandatory liquidity buffer
• Remuneration policies aligned with prudential risk management
• Direct supervisory oversight shifts to the EBA (alongside home NCA)
• Supervisory college convened, including home NCA, EBA, ECB, and relevant foreign regulators

Non-EUR Stablecoin Transaction Caps

MiCA Article 23 addresses the use of non-EUR stablecoins as a means of exchange within the EU. Where the EBA considers that a non-EUR EMT (or ART functioning as a stablecoin) is being extensively used for payments within the EU, it may:

• Require the issuer to stop issuing additional tokens
• Set a cap on the aggregate amount of tokens that can be in circulation
• Cap individual transaction values

Specifically, MiCA Article 58(3) provides that where daily transactions relating to a non-EUR stablecoin exceed €200 million within the EU, the issuer must notify the EBA and, following review, may be required to limit EU issuance until volumes fall below the cap.

This provision has material implications for Tether (USDT) and Circle (USDC) — the world’s two largest stablecoin issuers, both pegged to USD. Both issuers have had to analyze their EU transaction volumes and engage with the EBA on compliance pathways. Circle obtained EMI authorization in France in Q4 2024 in preparation for full MiCA compliance.

Exhibit: ART vs. EMT Regulatory Comparison

For global context on stablecoin regulation, including the US GENIUS Act debate and Singapore’s MAS framework, see global stablecoin regulation. For the complete MiCA analysis, see the MiCA compliance overview.

Regulatory reference: EUR-Lex — Regulation (EU) 2023/1114, Titles III-IV | ESMA MiCA page