27 CFR 24.305: Sweetening record.

A proprietor who sweetens natural wine with sugar or juice (unconcentrated or concentrated) under the provisions of this part shall maintain a record of sweetening by transaction date. The record will contain the following:

(a) The gallons and degrees Brix of the wine before sweetening;

(b) If concentrate is used, the degrees Brix of the concentrate;

(c) If sugar or juice, or both, are used, the gallon equivalent that would be required to sweeten the volume of wine to its maximum authorized total solids content;

(d) The quantity of sugar or juice used for sweetening; and

(e) The gallons and degrees Brix of the wine produced by sweetening.