((a)) Summary courts-martial may be convened by—

((1)) any person who may convene a general or special court-martial;

((2)) the commanding officer of a detached company, or other detachment of the Army;

((3)) the commanding officer of a detached squadron or other detachment of the Air Force or a corresponding unit of the Space Force; or

((4)) the commanding officer or officer in charge of any other command when empowered by the Secretary concerned.

((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.