Working containers holding food or food ingredients that are removed from their original packages for use in the food establishment, such as cooking oils, flour, herbs, potato flakes, salt, spices, and sugar shall be identified with the common name of the food, except that containers holding food that can be readily and unmistakably recognized, such as dry pasta, need not be identified.
D.C. Mun. Regs. tit. 25, r. 25-A803