(a) This Code applies to each member of the territorial military forces on duty status who is not in federal service. It also applies during the period of time in which he was under lawful order to be in a duty status.

(b) It also applies to any person who has the capacity to understand the significance of enlisting or accepting a commission in the territorial military forces and so voluntarily enlists or accepts such commission.

(c) A person who is serving with the territorial military who accepts pay or allowances and performs in military duty forces who submitted voluntarily to the military authority, meets the mental competence and minimum age qualifications of Title 10 of the United States Code Annotated, receives military pay or allowances, and performs military duties is subject to this Code until such person’s service has been terminated in accordance with law or appropriate regulations.

(d) A person not on a duty status who committed an offense may be ordered to duty status for military justice matters against this Code arising while on duty status and may be ordered to active duty involuntarily for the purpose of investigation under § 63719.2, trial by court-martial or nonjudicial punishment under § 63715.

SOURCE: UCMJ ARTICLE 2.