Section 80C. A nurse-midwife who is designated by the board of registration in nursing pursuant to the provisions of section eighty B may engage in the practice of nurse-midwifery; provided, however, that the nurse-midwife functions as a member of a health care team which includes a qualified physician licensed to practice medicine in the commonwealth which physician has admitting privileges in a hospital licensed by the department of public health for the operation of maternity and newborn services.