31 CFR § 337.6 - Conversions to book-entry.

---
identifier: "/us/cfr/t31/s337.6"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "31 CFR § 337.6 - Conversions to book-entry."
title_number: 31
title_name: "Money and Finance: Treasury"
section_number: "337.6"
section_name: "Conversions to book-entry."
chapter_name: "FISCAL SERVICE, DEPARTMENT OF THE TREASURY"
subchapter_number: "A"
subchapter_name: "BUREAU OF THE FISCAL SERVICE"
part_number: "337"
part_name: "SUPPLEMENTAL REGULATIONS GOVERNING FEDERAL HOUSING ADMINISTRATION DEBENTURES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "5 U.S.C. 301; 31 U.S.C. 321; Sec. 516, Pub. L. 102-550, 106 Stat. 3790."
regulatory_source: "59 FR 42162, Aug. 17, 1994, unless otherwise noted."
cfr_part: "337"
---


# 337.6 Conversions to book-entry.

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, and may not thereafter be converted to certificated form.

Certificated debentures may, upon the owner's request in accordance with § 337.5(c), be converted to book-entry. If such action is taken, the owner shall be deemed to have irrevocably waived the right to hold such debenture in certificated form.