Cal. Civ. Code § 37.111.308

(1) No person, while infected with a disease in a communicable form that can be transmitted by foods or who is a carrier of organisms that cause such a disease or while afflicted with a boil, an infected wound, diarrheal illness or acute gastrointestinal illness or an acute respiratory infection, shall work in a food service portion of the bed and breakfast in any capacity in which there is a likelihood of such person contaminating food or food contact surfaces with pathogenic organisms or transmitting disease to other persons. Food employees experiencing persistent sneezing, coughing or runny nose that causes discharges from the eyes, nose or mouth may not work with exposed food, clean food equipment, utensils, linens or unwrapped single-service or single-use articles.
(2) All personnel shall thoroughly wash their hands and the exposed portions of their arms with soap and warm water before starting work, during work, as often as is necessary to keep them clean and especially after smoking, eating, drinking or using the toilet. Employees shall keep their fingernails clean and trimmed.
(3) The outer clothing of all personnel must be clean.
(4) All personnel shall consume food only in areas that will not result in contamination of other food, equipment, utensils or items needing protection.
(5) All personnel shall maintain a high degree of personal cleanliness and shall conform to good hygienic practices during all working periods in the bed and breakfast establishment.