(1) The presiding officer may conduct all or part of the proceedings or permit a party or witness to appear by telephone or other electronic means if each participant in the proceedings has an opportunity to participate in, hear, and, if technically and economically feasible, see the entire proceeding while it is taking place. Cost of such appearance may be assessed to the party so appearing or on whose behalf the witness appears.

(2) If all or part of the proceedings is conducted as provided in subsection (1) of this section, the parties shall file and serve copies of all documentary evidence no less than three days prior to the proceeding. The presiding officer may, for good cause, allow exceptions to this requirement.