WAC 246-215-03336
WAC 246-215-03336. Preventing contamination from equipment, utensils, and linens — Linens and napkins, use limitation (FDA Food Code 3-304.13)
linens , such as cloth napkins, may not be used in contact with food unless they are used to line a container for the service of foods and the linens and napkins are replaced each time the container is refilled for a new consumer .