The unit shall have on duty sufficient direct care nursing personnel to ensure that all patients undergoing dialysis have nursing care, provided by registered nurses or licensed practical nurses trained in chronic dialysis, available at all times at a ratio of at least one direct care staff member to every three patients. If dialysis is performed in more than one room of the unit, at least one nursing staff member shall be present at all times in each room in which a patient is undergoing dialysis.
105 CMR, § 145.150