Any person using distilled spirits on which the tax has been determined, in the manufacture or production of medicines, medicinal preparations, food products, flavors, flavoring extracts, or perfume, which are unfit for beverage purposes shall be eligible for drawback at the time when such distilled spirits are used in the manufacture of such products as provided for in this subpart.

Every person claiming drawback under this subpart shall register annually with the Secretary; keep such books and records as may be necessary to establish the fact that distilled spirits received by him and on which the tax has been determined were used in the manufacture or production of medicines, medicinal preparations, food products, flavors, flavoring extracts, or perfume, which were unfit for use for beverage purposes; and be subject to such rules and regulations in relation thereto as the Secretary shall prescribe to secure the Treasury against frauds.

For the purpose of ascertaining the correctness of any claim filed under this subpart, the Secretary is authorized to examine any books, papers, records, or memoranda bearing upon the matters required to be alleged in the claim, to require the attendance of the person filing the claim or of any officer or employee of such person or the attendance of any other person having knowledge in the premises, to take testimony with reference to any matter covered by the claim, and to administer oaths to any person giving such testimony.