---
kind: "section"
citation: "49 C.F.R. § 171.21"
title: "49"
number: "171.21"
heading: "Assistance in investigations and special studies."
url: "https://uscodex.org/cfr/49/171.21"
---

# §171.21. Assistance in investigations and special studies.

- (a) A shipper, carrier, package owner, package manufacturer or certifier, repair facility, or person reporting an incident under the provisions of [§ 171.16](/cfr/49/171.16.md) must:
  - (1) Make all records and information pertaining to the incident available to an authorized representative or special agent of the Department of Transportation upon request; and
  - (2) Give an authorized representative or special agent of the Department of Transportation reasonable assistance in the investigation of the incident.
- (b) If an authorized representative or special agent of the Department of Transportation makes an inquiry of a person required to complete an incident report in connection with a study of incidents, the person shall:
  - (1) Respond to the inquiry within 30 days after its receipt or within such other time as the inquiry may specify; and
  - (2) **Provide true and complete answers to any questions included in the inquiry.**

## Notes

### Amendments

[68 FR 67760, Dec. 3, 2003]

### Authority

Authority: 49 U.S.C. 5101-5128, 44701; Pub. L. 101-410 section 4; Pub. L. 104-134, section 31001; Pub. L. 114-74 section 701 (28 U.S.C. 2461 note); 49 CFR 1.81 and 1.97.

### Amendments

[68 FR 67760, Dec. 3, 2003]