(a) Any interested persons may participate, in writing, in any Formal or Informal Presentation of Views held under the provisions of paragraph (f) or (g) of § 3282.152. The presiding officer shall, to the extent practicable, consider any such written materials.

(b) Any interested person may participate in the oral portion of any Formal or Informal Presentation of Views held under paragraphs (f) and (g) of § 3282.152 unless the presiding officer determines that participation should be limited or barred so as not unduly to prejudice the rights of the parties directly involved or unnecessarily to delay the proceedings.