(a) General rule.--General courts-martial may be convened by any of the following:
(1) The Governor.
(2) The Adjutant General.
(3) A deputy adjutant general authorized by a regulation of the Governor.
(4) The commanding general of a division.
(5) The general officer in command of a wing.
(b) Commanding officer as accuser.--When a commanding officer is an accuser, the court shall be convened by superior competent authority and may, in any case, be convened by such authority when deemed desirable by such authority.