27 CFR § 19.312 - Physical inventories.
A proprietor must take a physical inventory of the spirits and denatured spirits in tanks and other containers in the production account at the close of each calendar quarter. A proprietor must record the results of the inventory as provided in subpart V of this part and must show separately spirits and denatured spirits received for redistillation. TTB may require additional inventories be taken at any time.
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