CFR > Title 31 - Money and Finance: Treasury > SUBTITLE B—Regulations Relating to Money and Finance > CHAPTER II—FISCAL SERVICE, DEPARTMENT OF THE TREASURY (parts 200 to 391) > SUBCHAPTER B—BUREAU OF THE PUBLIC DEBT (parts 306 to 391) > PART 306—GENERAL REGULATIONS GOVERNING U.S. SECURITIES > SUBPART C—Transfers, Exchanges and Reissues (§306.15 to §306.24) > 306.19—Denominational exchanges of coupon securities.