ChainCatcher 消息，a16z 与 DeFi 教育基金（DeFi Education Fund）联合向美国证券交易委员会（SEC）委员 Hester Peirce 提交联合提案，提议建立安全港规则，创设“可推翻的推定”，即去中心化交易所（DEX）协议及其前端界面不属于《1934 年证券交易法》所定义的“交易所”。
同一天，a16z 还提交了第二封信函，呼吁 SEC 仿照 1998 年另类交易系统（ATS）规则，为集中式加密货币交易平台建立注册制度。两封信函的落款日期均为 9 月 14 日，三天后 SEC 发布了针对代币化股票交易场所的“创新豁免”（Innovation Exemption）。
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