34 C.F.R. § 86.402
(b) Except as provided in this subpart, no person or organization other than a party may participate in a hearing under this subpart.
(Authority: 20 U.S.C. 1145g)
[55 FR 33581, Aug. 16, 1990, as amended at 61 FR 66225, Dec. 17, 1996]