49 C.F.R. § 510.7
The NHTSA may require by the issuance of general or special orders any person, sole proprietorship, partnership, corporation, or other entity to file with the NHTSA, in such form as NHTSA may prescribe, periodic or special reports or answers in writing to specific questions. The responses to general or special orders will provide NHTSA with such information as it may require, including, but not limited to, information relating to the organization of that person, sole proprietorship, partnership, corporation, or other entity, its business, conduct, practices, management, and relation to any other person or entity. General or special orders which are required to be answered under oath are issued by the Chief Counsel. Any general or special order issued under this section contains the information specified in § 510.3(b) . Reports and answers filed in response to general or special orders must be made under oath, or otherwise, as NHTSA may prescribe.
49 C.F.R. §510.7