(a) Every record required to be maintained under this subpart shall be retained for a period not to exceed 2 years after December 31 of the year in which the transaction to which the record relates has occurred, and for such further period as the Administrator may require for purposes of any investigation or litigation under the Act, by written notice to the person required to keep such record under this subpart.

(b) Records of canning as required by subpart X of this part 381, subchapter C, 9 CFR chapter III, shall be retained as required in § 381.307; except that records required by § 381.302 (b) and (c) shall be retained as required by those sections.