34 C.F.R. § 668.120
(a)
(b) If the Secretary modifies, remands, or overturns the initial decision of the hearing official, the Secretary issues a decision that—
(3) Unless the decision is remanded to the hearing official for further review or determination of fact, becomes final upon its issuance.
(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; 57 FR 60035, Dec. 17, 1992]