46 C.F.R. § 139.165 – Documentation.

(a) Each TPO must retain the results of each survey or audit conducted under its approval, including:
1. (1) The names of the auditors and/or surveyors;
2. (2) The results of each audit or survey conducted; and
3. (3) Documentation showing continuing actions relative to an audit or survey, such as resolution of deficiencies and non-conformities.
(b) Each TPO must also retain the results of audits of their organization conducted by the Coast Guard.
(c) Records required by this part must be retained for a period of 5 years.