17 CFR § 230.409 - Information unknown or not reasonably available.

---
identifier: "/us/cfr/t17/s230.409"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "17 CFR § 230.409 - Information unknown or not reasonably available."
title_number: 17
title_name: "Commodity and Securities Exchanges"
section_number: "230.409"
section_name: "Information unknown or not reasonably available."
chapter_name: "SECURITIES AND EXCHANGE COMMISSION"
part_number: "230"
part_name: "GENERAL RULES AND REGULATIONS, SECURITIES ACT OF 1933"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 77b, 77b note, 77c, 77d, 77f, 77g, 77h, 77j, 77r, 77s, 77z-3, 77sss, 78c, 78d, 78j, 78 78m, 78n, 78o, 78o-7 note, 78t, 78w, 78(d), 78mm, 80a-8, 80a-24, 80a-28, 80a-29, 80a-30, and 80a-37, and Pub. L. 112-106, sec. 201(a), sec. 401, 126 Stat. 313 (2012), unless otherwise noted."
cfr_part: "230"
---


# 230.409 Information unknown or not reasonably available.

Information required need be given only insofar as it is known or reasonably available to the registrant. If any required information is unknown and not reasonably available to the registrant, either because the obtaining thereof could involve unreasonable effort or expense, or because it rests peculiarly within the knowledge of another person not affiliated with the registrant, the information may be omitted, subject to the following conditions:

(a) The registrant shall give such information on the subject as it possesses or can acquire without unreasonable effort or expense, together with the sources thereof.

(b) The registrant shall include a statement either showing that unreasonable effort or expense would be involved or indicating the absence of any affiliation with the person within whose knowledge the information rests and stating the result of a request made to such person for the information.

[Reg. C, 12 FR 4072, June 24, 1947, as amended at 14 FR 91, Jan. 7, 1949]