29 C.F.R. § 4903.12

(a) Tax refund offset. In most cases, the Financial Management Service uses the Treasury Offset Program to collect debts owed to PBGC by the offset of tax refunds and other Federal payments. See § 4903.10(c) of this part. If not already transferred to the Financial Management Service under § 4903.10 of this part, PBGC will refer to the Treasury Offset Program any past-due, legally enforceable debt for collection by tax refund offset. See 26 U.S.C. 6402(d), 31 U.S.C. 3720A and 31 CFR 285.2.

(b) Notice. At least 60 days prior to referring a debt owed to the Treasury Offset Program, PBGC will send notice to the debtor in accordance with the requirements of § 4903.5 of this part. PBGC will certify to the Financial Management Service's Treasury Offset Program that the debt is past due and legally enforceable in the amount submitted, and that the PBGC has made reasonable efforts to obtain payment of the debt as described in 31 CFR 285.2(d). In addition, PBGC will certify its compliance with all applicable due process and other requirements described in this part and other Federal laws. See 31 U.S.C. 3720A(b) and 31 CFR 285.2.

(c) Administrative review. The notice described in § 4903.5 of this part will provide the debtor with at least 60 days prior to the initiation of tax refund offset to request an administrative review as described in § 4903.11(c) of this part. PBGC may suspend collection through tax refund offset and/or other collection actions pending the resolution of the debtor's dispute.