Thailand writes rules for the plumbing

Most crypto regulation has been written about instruments: what a token is, whether it is a security, who may issue it. Thailand's securities regulator has gone at the problem from the other end, and the result is more intrusive than a classification rule.

The consultation proposes a cap of roughly $151,000 on stablecoin transfers, alongside a set of conduct requirements aimed at the firms that supply liquidity to digital asset brokers rather than at the assets being traded.

Exchange operators would have to monitor and periodically review the conduct of their market makers. The regulator's stated concern is that liquidity arrangements can become channels for moving illicit funds, which is a description of how market-making actually works when nobody is checking.

A market maker sits on both sides of a trade by design. That makes it the natural place to disguise a transfer as a transaction, and the natural place for a supervisor to look if it wants to see flows rather than balances.

For brokers the proposal goes further. Liquidity providers would be prohibited from serving stablecoin-to-baht trading activity altogether, which draws a line directly around the point where the token meets the domestic currency.

That is the provision with the most force. Controlling the on-ramp and off-ramp between a stablecoin and the local unit is how a jurisdiction regulates a dollar-denominated instrument it has no authority over.

Other liquidity providers would face requirements on location, regulation and anti-money-laundering controls. A qualifying provider could not operate from a jurisdiction that fails to implement Financial Action Task Force recommendations, and would need supervision by an appropriate regulator.

Brokers would carry their own obligations: reasonable grounds to believe customer assets can be safeguarded, disclosure of their liquidity providers and of any conflicts, and reviews covering the origin of assets, the purpose of transactions and provider behaviour.

Source exchanges used by brokers would face comparable standards, needing supervision and ongoing screening. Taken together the package treats the supply of liquidity as a regulated activity in its own right, which is a position few jurisdictions have taken explicitly.

The consultation closes on September 25, and the regulator can revise, postpone or abandon parts of the proposal afterwards. Transfer caps in particular have a history of being softened between draft and rule.

Whether the cap survives matters less than the architecture around it. A number can be raised; a regime that makes every intermediary in the chain individually accountable for who it deals with is the harder thing to undo.