All rooms shall be adequately lighted and ventilated. They shall be ventilated to prevent collection of moisture on walls and ceilings of all rooms and on equipment and structural surfaces in production, processing, and storage areas. Mechanical ventilation and air conditioning systems of salvaging or reconditioning rooms shall be equipped with screens and air-filter devices. The lighting fixtures shall be shatter-resistant and equipped with effective protective devices to prevent contamination of food in the event of their breakage.
MS s 31.101
September 23, 2013