R.I. Gen. Laws § 30-3-21: Efficiency boards.

The capacity and general fitness for service of any commissioned officer or warrant officer of the national guard, may be investigated by an efficiency board. The board shall be appointed by the governor and shall consist of three (3) commissioned officers of the national guard senior in rank, when possible, to the officer under investigation. If the findings of the board be unfavorable to the officer under investigation and are approved by the governor, he or she shall be discharged from the national guard, subject to the provisions of § 30-3-39.