§ 205. Prohibition against eating meals in certain workrooms. No employee shall take or be permitted to take any food into a room of any working place where lead, arsenic or other poisonous substances or injurious or noxious fumes, dust or gases exist in harmful conditions or are present in harmful quantities as an incident or result of the business carried on in such working place. Notice to the foregoing effect shall be posted in such room. No employee, unless his presence is necessary for the proper conduct of the business, shall remain in any such room during the time allowed for meals. The employer shall provide a suitable place in such establishment in which the employees may eat.