10 USC 949f - Challenges

(a) Challenges Authorized.— 
The military judge and members of a military commission under this chapter may be challenged by the accused or trial counsel for cause stated to the commission. The military judge shall determine the relevance and validity of challenges for cause. The military judge may not receive a challenge to more than one person at a time. Challenges by trial counsel shall ordinarily be presented and decided before those by the accused are offered.
(b) Peremptory Challenges.— 
Each accused and the trial counsel are entitled to one peremptory challenge. The military judge may not be challenged except for cause.
(c) Challenges Against Additional Members.— 
Whenever additional members are detailed to a military commission under this chapter, and after any challenges for cause against such additional members are presented and decided, each accused and the trial counsel are entitled to one peremptory challenge against members not previously subject to peremptory challenge.