The adjutant general shall maintain a list to be known as the unassigned list. A commissioned officer or warrant officer of the national guard may be transferred to the unassigned list:

(1)  Pending the acceptance of his or her resignation;

(2)  If the officer shall have been absent without leave for over three (3) months;

(3)  If the officer shall fail to maintain his or her qualifications for federal recognition;

(4)  Pending reassignment after disbandment of organization; and

(5)  For such other reasons as may be established by the governor.