Kan. Admin. Regs. § 19-7-8
In any proceeding before the hearing commissioners or a presiding member, relevant and material evidence shall be admissible, but there shall be excluded such evidence as is unduly repetitious or cumulative, or such evidence as is not of any probative value. The presiding member shall rule on the admissibility of all evidence, and shall otherwise control the reception of evidence so as to confine it to the issues in the proceeding. The production of further evidence upon any issue may be ordered. Direct testimony of any witness may be offered as an exhibit, or as prepared written testimony to be copied into the transcript. Cross-examination of the witness presenting such written testimony or exhibit shall proceed at the hearing at which such testimony or exhibit is authenticated. Whenever in the circumstances of a particular case it is deemed necessary or desirable, the hearing commissioners or the presiding member may direct that testimony to be given upon direct examination shall be reduced to exhibit form or to the form of prepared written testimony.
Kan. Admin. Regs. § 19-7-8