The commission or the complainant shall have the power to reasonably amend the complaint as a matter of right at any time before hearing thereon, and thereafter at the discretion of the presiding member. The respondent and the complainant shall be notified of any such amendment in writing by the commission. The complaint may be withdrawn by the complainant at any time before a final determination of probable cause. After service of a notice of hearing, the complainant may request and the commission shall decide whether or not a complaint may be withdrawn.
Kan. Admin. Regs. § 19-5-3