Ill. Admin. Code tit. 95, § 400.120 – Territorial Applicability of the Code

a) Territorial jurisdiction exists so long as there is personal jurisdiction under Code Section 2. This Manual applies wherever and whenever the Code applies. Courts-martial, courts of inquiry, and nonjudicial punishment proceedings may be convened and conducted, and punishment may be imposed, while in the State and while those units are serving outside the State with the same jurisdiction and powers as if the proceedings were held within the State. (Code Section 5(b))
b) Courts-martial may be conducted anywhere and in any facility as mission requirements and military exigencies dictate, in the judgment of the appropriate senior force judge advocate.