20 C.F.R. § 422.829
(a) Referral to the Department of the Treasury for offset.
(c) Notice to debtor. Before we refer any administrative debt for collection by Administrative Offset, we will send the debtor a notice that explains all of the following:
(3) That we will refer the debt for Administrative Offset (except as provided in paragraph (c)(9) of this section) at the expiration of not less than 60 calendar days after the date of the notice unless, within that 60-day period:
(d) Federal Salary Offset: amount, frequency and duration of deductions.
(4) After Federal Salary Offset begins, the debtor may request a reduction in the amount deducted from disposable pay each payday. When Treasury determines that the amount deducted causes financial harm under the rules in § 422.833(j), they will reduce that amount. Treasury will not reduce the amount from the debtor's disposable pay if the debt was caused by: