# 19.499 Authorized abbreviations to identify marks.In addition to the other abbreviations and symbols authorized under this part for use in marking containers, a proprietor may use the following abbreviations to identify the following marks:| Mark | Abbre-viation || --- | --- || Completely Denatured Alcohol | CDA || Gallon or Wine Gallon | WG || Gross Weight | G || Proof | P || Specially Denatured Alcohol | SDA || Specially Denatured Rum | SDR || Tare | T || Tax Determined | TD || Wine Spirits Addition | WSA |(26 U.S.C. 5206)