SEC legislation, 1963 : Hearings before a subcommittee of the Committee on Banking and Currency, United States Senate, Eighty-eighth Congress, first session, on S. 1642, a bill to amend the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended, to extend disclosure requirements to the issuers of additional publicly traded securities, to provide for improved qualification and discliplinary procedures for registered brokers and dealers, and for other purposes