R.I. Gen. Laws § 30-3-24: Discharge of officers.

A commissioned officer or warrant officer of the national guard may be discharged and his or her commission or warrant terminated, by reason of death; by acceptance by proper authority of resignation; on account of inefficiency; on account of physical disability; absence without leave for three (3) months; dismissal pursuant to sentence of a general court-martial or special court-martial; removal from the state; and upon disbandment of an organization, withdrawal of federal recognition, and for such other reasons as may be prescribed by the governor.