Ark. Code Ann. § 12-61-101: Division and composition

(a) The militia shall be divided into two (2) parts: the organized, consisting of the active and inactive Army National Guard and Air National Guard; and the unorganized, consisting of all those persons of the militia not in the active or inactive Army National Guard or Air National Guard.

(b) The militia shall consist of all able-bodied male residents of the state between the ages of seventeen (17) and forty-five (45) years who are, or intend to become, citizens of the United States, unless exempt by law, together with all other acceptable volunteers, waiving necessary requirements.