In August 2023, the Securities and Exchange Commission set out an extensive list of rules for the marketing of private investment funds. These rules covered funds that had, until then, been specifically exempt from SE regulation. But the SEC was employing new mandates bestowed upon it by (its interpretation of) the Dodd-Frank Act, which in turn was a legislative response to the global financial crises of 2007-09. Six financial industry trade bodies joined to file a lawsuit to strike the new rules. These bodies included the National Association of Private Fund Managers and the Alternative Investment Management Association. They made four arguments. I'll rank them from the most procedural to the most substantive. They argued that the new regulation violates the premises of notice-and-comment rule making (in re the final rule was not closely enough related to the original rule, so there had been no proper notice of the final rule); that the SEC is required to produc...