29 C.F.R. § 4233.12

(a) Review period. Except as provided in paragraph (c) of this section, PBGC will approve or deny an application for partition submitted to it under this part within 270 days after the date PBGC issued a notice to the plan sponsor of the completed application under § 4233.10(c).

(b) Determination on application. PBGC may approve or deny an application at its discretion. PBGC will notify the plan sponsor in writing of PBGC's decision on an application. If PBGC denies the application, PBGC's written decision will state the reason(s) for the denial. If PBGC approves the application, PBGC will issue a partition order under section 4233(c) of ERISA and § 4233.14.

(c) Conditional determination on application. At the request of a plan sponsor, PBGC may, in its discretion, issue an approval of an application conditioned on Treasury issuing a final authorization to suspend under section 305(e)(9)(H)(vi) of ERISA and any other terms and conditions set forth in the conditional approval. The conditional approval will include a written statement of preliminary findings, conclusions, and conditions. The conditional approval is not a final agency action. The proposed partition will only become effective upon satisfaction of the required conditions, and the issuance of an order of partition under section 4233(c) of ERISA.

(d) Final agency action. Except as provided in paragraph (c) of this section, PBGC's decision on an application for partition under this section is a final agency action for purposes of judicial review under the Administrative Procedure Act (5 U.S.C. 701 et seq.).