Comment Letter RE Self-Regulatory Organizations; National Association of Securities Dealers, Inc… SEC Release No 34-56039 File No SR-NASD-2007-021 From Steven B. Caruso, PIABA President, 2007 To Nancy M. Morris, Secretary, Securities and Exchange Commission Date Mon, 07/23/2007 - 12:00pm Comment Letter Link Proposed Amendment to Rule 12100(u) of the NASD's Code of Arbitration Procedure for Customer Disputes