The DeFi Education Fund, Aave Labs, Uniswap Labs, Paradigm, Andreessen Horowitz, and others have sent a joint letter urging the SEC to codify its recent “non‑custodial user interface” broker guidance into formal rules.The coalition backs the SEC staff’s view that neutral, self‑custodial front ends should not be treated as brokers, but warns that vague definitions risk sweeping in validators, RPC/API providers, oracles, and cloud services.With the CLARITY Act stalled in the Senate, the letter frames SEC rulemaking as the only near‑term path to legal certainty for DeFi infrastructure in the U.S.