(1) An officer of the national guard must be retired by order of the governor for the following reasons: (a) upon loss of federal recognition; or (b) unfitness for military service because of a physical disability. (2) An officer is retired from the militia with the grade and rank held at the time of retirement.
Retirement Of Officers
Mont. Code Ann. § 10-1-203, under Officers of Militia.
Mont. Code Ann. § 10-1-203