Rule Summary: Establishes duties of dealers acting as broker’s brokers, including when conducting auctions of municipal securities known as “bid-wanteds”; requires broker’s brokers to establish policies and procedures regarding bid-wanteds and offerings; and prohibits certain wrongful conduct.

Rule Summary: Requires dealers, when acting in the capacity of an underwriter for a 529 savings plan or ABLE program, to submit information on a semi-annual or, in the case of performance data, annual basis, to the MSRB.