Kan. Stat. § 25-306e
If any person receives two or more nominations for the same office, such person shall file within seven days, including Saturday, Sunday and holidays, after the last nomination is received, a written statement, signed and sworn to by such person, designating which nomination such person desires to accept. Such statement shall be filed in the office where nomination papers are required to be filed. Upon filing such statement, such person shall be deemed to have declined any other nomination. If such person refuses or neglects to file such statement, the officer with whom the nomination papers are filed, immediately upon the expiration of the seven-day period, shall make and file in such officer's office an election of one nomination for such candidate. The county election officer shall print such candidate's name upon the official ballot under the designation so selected, and under no other designation.
K.S.A. 25-306e