Rule Summary: Requires dealers to effect transactions in municipal securities with customers at fair and reasonable prices, if acting as principal, and to make reasonable efforts to obtain fair and reasonable prices for customers and to charge fair and reasonable commissions, if acting as agent.

Rule Summary: Establishes requirements relating to CUSIP numbers for dealers and, in competitive offerings, municipal advisors; requires underwriter participation in the New Issue Information Dissemination Service (NIIDS); and requires submission of certain information and documents related to auction rate securities and variable rate demand obligations to the SHORT system.