Kan. Stat. § 66-151
Subject to the provisions of K.S.A. 66-1220a and amendments thereto and rules and regulations regarding protection of confidentiality adopted by the commission pursuant to K.S.A. 66-101c, 66-1,190 and 66-1,203, and amendments thereto, upon application of any person, the commission shall furnish certified copies of any classification, rates, rules, regulations or orders, at costs determined pursuant to commission policies and procedures; and such certified copies, or printed copies published by authority of the corporation commission, shall be admissible in evidence in any suit, and sufficient to establish the fact that in any charge, rate, rule, order or classification therein contained, and which may be in issue in the trial, is the official act of the corporation commission; and such determinations and orders of the commission shall be prima facie evidence, in any action in which they are offered, of the reasonableness and justness of the classifications, rates and charges involved therein and of all other matters therein found and determined; and after the lapse of thirty days from the time such determination and orders shall be made, no suit then pending to set the same aside, and they remaining in full force and effect, such determinations and orders shall be held to be conclusive as to the matters involved therein. A substantial compliance with the requirements of this act shall be sufficient to give effect to all determinations and orders made and established by the commission.
K.S.A. 66-151