The South Carolina Department of Health and Environmental Control may establish policies whereby duly registered nurses may provide such health care, under the direction of a physician licensed to practice medicine in South Carolina and under the guidance of a registered pharmacist, as the dispensing of drugs for the treatment of tuberculosis and venereal disease, maternal and infant care, crippled children, family planning, immunization, and any other public health program now existing, or approved by the South Carolina Medical Association. The original diagnosis and treatment as prescribed by the physician shall be maintained on the individual patient's records.