34 C.F.R. § 300.182
(k) Unless the Secretary remands the matter as provided in paragraph (j) of this section, the Secretary issues the final decision, with any necessary modifications, within 30 days after notifying the Hearing Official or Hearing Panel that the initial decision is being further reviewed.
(Approved by the Office of Management and Budget under control number 1820-0030)
(Authority: 20 U.S.C. 1412(d)(2))