Special components

The petitioner or complainant may annex such exhibits, illustrations, written testimony, and other evidence, as well as any brief of law and fact that the petitioner deems necessary or desirable to support the petition or statement of complaint. Insofar as man be practical, however, each petition or statement of complaint and the exhibits and other evidence annexed thereto shall be sufficiently complete when filed to present the entire ease of the petitioners or complainant, subject only to cross examination by the other parties and by the commission at the time of hearing.