28 CFR § 5.3 - Filing of a registration statement.
All statements, exhibits, amendments, and other documents and papers required to be filed under the Act or under this part shall be submitted in triplicate to the Registration Unit. An original document and two duplicates meeting the requirements of Rule 1001(4), Federal Rules of Evidence (28 U.S.C. Appendix), shall be deemed to meet this requirement. Filing of such documents may be made in person or by mail, and they shall be deemed to be filed upon their receipt by the Registration Unit.