Any person who is required to maintain records of operations under this part shall file and retain records and copies of reports in the following manner:
(a) Keep on file for a period of not less than 3 years after the date of the report covering the operation, in such a way as to allow inspection by TTB officers, all those records of operations, all supporting or supplemental records, and copies of all reports as required by this part. However, the appropriate TTB officer may require that the records and copies of reports be kept for an additional period, not to exceed 3 years.
(b) File all records and copies of reports at the premises where the operations are conducted.
(c) Make the files of records and copies of reports available to TTB officers during regular business hours for examination.
[T.D. ATF-199, 50 FR 9162, Mar. 6, 1985, as amended by T.D. ATF-435, 66 FR 5475, Jan. 19, 2001]