(1) The efficiency, moral character and general fitness for retention of any commissioned officer may be investigated and determined by an examining board. The members of an examining board shall be senior in rank to the officer under investigation unless unavailable.
(2) The physical fitness for further service of any commissioned officer may be investigated and determined by a medical examining board of officers.
(3) Efficiency and medical examining boards shall be appointed by, or upon direction of, the governor. Whenever an examining board shall be appointed for the purpose of determining the fitness of any officer for continued federal recognition, such board shall be appointed by the commander designated in the applicable laws of the United States and the regulations issued thereunder.