5 CFR §1639.20

1. (a)The regulations in this subpart provide Board procedures for the collection by salary offset of a Federal employee's pay to satisfy certain debts owed to the Board or to Federal agencies.
2. (b)The regulations in this subpart apply to collections by the Executive Director, from:
   1. (1)Federal employees who owe debts to the Board; and
   2. (2)Employees of the Board who owe debts to Federal agencies.
3. (c)The regulations in this subpart do not apply to debts arising under the Internal Revenue Code of 1986, as amended (title 26, United States Code); the Social Security Act (42 U.S.C. 301 et seq.); the tariff laws of the United States; or to any case where collection of a debt by salary offset is explicitly provided for or prohibited by another statute (e.g., travel advances in 5 U.S.C. 5705 and employee training expenses in 5 U.S.C. 4108).
4. (d)Nothing in the regulations in this subpart precludes the compromise, suspension, or termination of collection actions under the standards implementing the Federal Claims Collection Act (31 U.S.C. 3711 et seq., 4 CFR Parts 101-105, 38 CFR 1.900-1.994).
5. (e)A levy pursuant to the Internal Revenue Code takes precedence over a salary offset under this subpart, as provided in 5 U.S.C. 5514(d).
6. (f)This subpart does not apply to any adjustment to pay arising out of an employee's election of coverage or a change in coverage under a Federal benefits program requiring periodic deductions from pay, if the amount to be recovered was accumulated over four pay periods or less.