The board shall prescribe such sanitary rules as it may deem necessary, with particular reference to the precautions necessary to be employed to prevent the creating and spreading of infectious and contagious diseases; and it shall be unlawful for the owner of any salon or school of cosmetology to permit any person to sleep in or use for residential purposes any room used wholly or in part as a salon or school of cosmetology.
63 P.S. § 520