Food employees shall wear clean and effective hair restraints, such as hairnets or beard nets, if appropriate, and clothing that covers body hair that are designed and worn to effectively keep hair from contacting exposed food, clean equipment and utensils, linens, and unwrapped single-service and single-use articles. Hats, caps, scarves or other head covers are acceptable if the hair is contained to prevent contamination. Hair spray and tying back the hair in a ponytail are not effective hair restraints.
D.C. Mun. Regs. tit. 25, r. 25-A502