(B) One's professional competence to serve as a machine shorthand official court reporter shall be demonstrated by having passed an examination conducted by such entities as the Nebraska Supreme Court may from time to time designate, which tests one's reporting skills and knowledge of spelling, grammar, and the reporting craft. The skills portion of the examination shall require the reporter to report and transcribe each of three items of dictation consisting of (i) literary material, (ii) jury instructions, and (iii) two-voice testimony. Each dictation segment shall be of 5 minutes duration. The literary material must be reported at a rate of not less than 180 words per minute, the jury charge at not less than 200 words per minute, and the two-voice testimony at not less than 225 words per minute. All of the dictated material must be transcribed with 95 percent accuracy in a period of not more than 31/2 hours, during which time a dictionary may be used. In grading this portion of the test, a maximum of 45 errors is permitted on the literary material, a maximum of 50 errors is permitted on the jury charge, and a maximum of 57 errors is permitted on the two-voice testimony. The knowledge portion of the examination shall consist of not less than 100 written multiple-choice questions and must be passed with a score of not less than 70 percent in a period of time as determined by the examiner, but no more than 90 minutes per 100 questions. A dictionary may not be used during this portion of the examination.