(a) In the state military forces not in federal service, the commanding officer of a garrison, fort, post, camp, air base, auxiliary air base, or other place where troops are on duty, or of a regiment, wing, group, detached battalion, detached squadron, detached company, or other detachment, may convene a summary court-martial consisting of one commissioned officer. The proceedings shall be informal.
(b) When only one commissioned officer is present with a command or detachment he shall be the summary court-martial of that command or detachment and shall hear and determine all summary court-martial cases brought before him. Summary courts-martial may, however, be convened in any case by superior competent authority, when considered desirable by him.