33 CFR §150.840

1. (a)The licensee must keep copies at the deepwater port of the reports, records, test results, and operating data required by this part. In the case of unmanned deepwater ports, these copies must be kept at the operator's principal office rather than on the deepwater port.
2. (b)The copies must be readily available to Coast Guard inspectors.
3. (c)Except for personnel records under § 150.845 of this part, the copies must be kept for 3 years.