Kan. Stat. Ann. § 4-4,451
In accordance with section 2 of article 2 of the constitution of the state of Kansas, the state of Kansas is divided into 40 single member state senatorial districts. Such districts are reapportioned in accordance with section 1 of article 10 of the constitution of the state of Kansas.
L. 2002, ch. 39, § 1; April 11.