Notice of Filing of a Proposed Rule Change, as Modified by Amendment No. 1 Thereto, Consisting of Amendments to MSRB Rules A-12, on Initial Fee, G-14, on Reports of Sales or Purchases, and the Facility for Real-Time Transaction Reporting and Price Dissemination ("RTRS Facility"); Deletion of Rules A-14, on Annual Fee, A-15, on Notification to the Board of Change in Status or Change of Name or Address, and G-40, on Electronic Mail Contacts; Deletion of References to RTRS Testing Requirements Under Rules G-14(b)(v), G-14(c), on RTRS Procedures, and in the RTRS Facility; Elimination of MSRB Forms RTRS and G-40; and Adoption of a Single, Consolidated Electronic Registration Form, New Form A-12