Final answer:
A registered nurse is required to be in a facility unless a waiver has been secured. They provide necessary medical care and supervision, assessing patient needs, administering treatments, and monitoring patient conditions.
Step-by-step explanation:
Unless a waiver has been secured, a registered nurse is required to be in the facility. This is to ensure that there is a qualified healthcare professional available to provide necessary medical care and supervision. Registered nurses play a critical role in healthcare settings, including hospitals, clinics, and nursing homes, where they are responsible for assessing patient needs, administering treatments, and monitoring patient conditions.