34 C.F.R. § 668.118
(c) The hearing official bases any findings of fact only on evidence properly presented before him, on matters given official notice, or on facts stipulated to by the parties.
(Authority: 20 U.S.C. 1094)
[52 FR 30115, Aug. 12, 1987, correctly designated at 52 FR 46354, Dec. 7, 1987, as amended at 57 FR 47753, Oct. 19, 1992]