PBGC may initiate litigation pursuant to 29 U.S.C. 1302 with delinquent debts on which aggressive collection activity has been taken in accordance with this part and that should not be compromised, and on which collection activity should not be suspended or terminated. Alternatively, PBGC may refer debts owed to PBGC having a principal balance over $100,000, or such higher amount as authorized by the Attorney General, to the Department of Justice for approval of any compromise of a debt or suspension or termination of collection activity. See §§ 4903.8 and 4903.9 of this part; 31 CFR 902.1, 903.1, and part 904. PBGC may authorize the Financial Management Service to refer to the Department of Justice for litigation those delinquent debts that have been transferred to the Financial Management Service under § 4903.10 of this part.