Arkansas constitution
Article 8: apportionment--membership in general assembly
Section 3

The Senate shall consist of thirty-five members. Senatorial districts shall at all times consist of contiguous territory, and no county shall be divided in the formation of such districts. "The Board of Apportionment" hereby created shall, from time to time, divide the state into convenient senatorial districts in such manner as that the Senate shall be based upon the inhabitants of the state, each senator representing, as nearly as practicable, an equal number thereof; each district shall have at least one senator.