31 CFR § 337.11
Original issue and conversions
July 31, 2023
§ 337.11 Original issue and conversions.
Upon implementation of the book-entry debenture system, to be announced in advance by separate public notice, all new debentures will be issued only in book-entry form in the exact amount payable to the owner. Once issued in book-entry form, a debenture may not be converted to certificated form.