32 U.S.C. § 327

1. (a)In the National Guard not in Federal service, general, special, and summary courts-martial may be convened as provided by the laws of the respective States, the Commonwealth of Puerto Rico, the District of Columbia, Guam, and the Virgin Islands.
2. (b)In the National Guard not in Federal service—
   1. (1)general courts-martial may be convened by the President;
   2. (2)special courts-martial may be convened—
      1. (A)by the commanding officer of a garrison, fort, post, camp, air base, auxiliary air base, or other place where members of the National Guard are on duty; or
      2. (B)by the commanding officer of a division, brigade, regiment, wing, group, detached battalion, separate squadron, or other detached command; and
   3. (3)summary courts-martial may be convened—
      1. (A)by the commanding officer of a garrison, fort, post, camp, air base, auxiliary air base, or other place where members of the National Guard are on duty; or
      2. (B)by the commanding officer of a division, brigade, regiment, wing, group, detached battalion, detached squadron, detached company, or other detachment.
3. (c)The convening authorities provided under subsection (b) are in addition to the convening authorities provided under subsection (a).