Tex. Government Code § 432.004: TERRITORIAL APPLICABILITY OF CHAPTER.

(a) This chapter applies in all places and to all persons otherwise subject to this chapter while they are serving outside the state and while they are going to and returning from service outside the state, in the same manner and to the same extent as if they were serving inside the state.

(b) Courts-martial and courts of inquiry may be convened and held in units of the state military forces while those units are serving outside the state, with the same jurisdiction and power as to persons subject to this chapter as if the proceedings were held inside the state, and offenses committed outside the state may be tried and punished either inside or outside the state.

Acts 1987, 70th Leg., ch. 147, Sec. 1, eff. Sept. 1, 1987.