(a) Daily record entries. A proprietor must make entries required by this part in records on a daily basis for each transaction or operation and not later than the close of the next business day after the transaction or operation occurred. However, if a proprietor prepares supplemental or auxiliary records when an operation or transaction occurs and those records contain all of the required information, the proprietor may make entries into the daily records not later than the close of business on the third business day following the day on which the transaction or operation occurred.

(b) Tax records. A proprietor must enter the tax determination and the taxable removal of distilled spirits in the proprietor's records on the day on which tax determination and taxable removal occurs.

(26 U.S.C. 5207)