31 C.F.R. § 375.23 How does the securities delivery process work?
Title 31 - Money and Finance: Treasury
If any of the offers you submitted are accepted, you must transfer the correct book-entry Treasury securities in the correct par amount against the correct settlement amount on the settlement date. You must deliver the securities to the account specified in the redemption operation announcement.
Title 31: Money and Finance: Treasury
PART 375—MARKETABLE TREASURY SECURITIES REDEMPTION OPERATIONS
Subpart C—Determination of Redemption Operation Results; Settlement
§ 375.23 How does the securities delivery process work?

