A safe harbour proposed for DEX front-ends

a16z and the DeFi Education Fund have submitted a joint proposal to SEC Commissioner Hester Peirce asking for a safe harbour that would create a rebuttable presumption that decentralised exchange protocols — and, notably, their front-ends — are not exchanges under the Exchange Act.

The inclusion of front-ends is the substantive part. The protocol-versus-interface distinction has been the unresolved question in every enforcement conversation about decentralised trading: a protocol may be autonomous while the website most users reach it through is operated by an identifiable company. A presumption covering both is a request to settle that, not merely to clarify it.

The word rebuttable is doing work too. The proposal is not for an exemption but for a default that the regulator can argue against in a specific case — a lower ask than immunity, and a harder one to dismiss.

a16z filed a second letter the same day, asking the SEC to build a registration regime for centralised crypto trading platforms modelled on the alternative trading system rules of 1998. Taken together the two letters propose a split: a registration path for the centralised venues, a presumption of non-registration for the decentralised ones.

Both letters are dated 14 September, three days before the SEC issued its Innovation Exemption for tokenised stock venues. The sequence is worth noting when reading either document: the letters were written into a different regulatory moment than the one they arrived in.