Maryland Code, BUSINESS OCCUPATIONS AND PROFESSIONS 5-607
(1) employ in the beauty salon an individual with an infectious or contagious disease that presents a hazard to a patron; or
(2) after discovering an individual has an infectious or contagious disease that presents a hazard to a patron, continue to employ the individual in the beauty salon.
(b) (1) An individual who knows that the individual has an infectious or contagious disease that presents a hazard to a beauty salon patron may not practice cosmetology.
(2) An individual who knows that another individual has an infectious or contagious disease that presents a hazard to a beauty salon patron may not practice cosmetology on that other individual.
(c) An individual may not practice cosmetology in a careless or negligent manner so as to:
(1) cause an infection; or
(2) impart an infectious or contagious disease that presents a hazard to a beauty salon patron.