Kan. Stat. § 46-160
Any member of the senate or house of representatives resigning from such office shall file a written notice of such resignation in the office of the secretary of state. Such notice of resignation shall state the effective date of the resignation. Upon receiving such notice of resignation, the secretary of state shall notify the governor and the president of the senate if the person is a member of the senate or the speaker of the house of representatives if the person is a member of the house of representatives. The secretary of state shall notify the county chairperson of the political party required to call the convention for the selection of a person to be appointed to fill the vacancy occasioned by such resignation as required by K.S.A. 25-3902, and amendments thereto. The secretary of state shall notify the chairperson of the political party of each county, all or part of which, is located within the district of the officer resigning from office.
K.S.A. 46-160