SECTION 785:4-7-4. Presentation of evidence and examination of witnesses

  After all interested parties have entered their appearances, the Hearing Examiner shall proceed to admit into evidence any additional statements filed and then proceed to entertain presentation of evidence and testimony. The testimony of a witness shall be taken only upon oath or affirmation. Witnesses may be sworn individually or as a group. Each party shall have the right to call and examine witnesses, to introduce exhibits, to crossexamine opposing witnesses on any matter relevant to the issues even though that matter was not covered in the direct examination, to object to the introduction of evidence, to impeach any witness regardless of which party called him first to testify, to rebut evidence presented, and to call and examine an adverse party or witness as if under cross-examination. Board members and staff may participate as appropriate, using their technical knowledge and experience for the primary purpose of developing a full, fair, accurate and complete hearing on all issues relevant to the hearing. Questioning of witnesses will generally be permitted only by the attorneys of parties so represented, or by parties appearing on their own behalf, or by members of the Board or its staff.