See Full Constitution
Part Second

Article 26. Senatorial Districts, How Constituted

And that the state may be equally represented in the senate, the legislature shall divide the state into single member districts, as nearly equal as may be in population, each consisting of contiguous towns, city wards and unincorporated places, without dividing any town, city ward or unincorporated place. The legislature shall form the single member districts at its next session after approval of this article by the voters of the state and thereafter at the regular session following each decennial federal census.