The licensed practical nurse may perform any of the duties described in § 36-9-4 and with appropriate training as approved by the board rules and regulations may, under the direction of a physician licensed or exempt from licensing pursuant to chapter 36-4 , dentist or registered nurse: (1) Perform additional specialized nursing functions; and (2) Assist with teaching, supervision, delegating, and evaluation of health and nursing practices. Source: SDCL, § 36-9-4 (1) as enacted by SL 1972, ch 204 , § 2; SL 1976, ch 228 , § 5.