204.31—Excluded debts or claims.
This regulation does not apply to:
(a)
Debts or claims arising under the Internal Revenue Code of 1954 as amended (26 U.S.C. 1 ), or the tariff laws of the United States.
(b)
Any case where collection of a debt by salary offset is explicitly provided for or prohibited by another statute, such as travel advances in 5 U.S.C. 5705 and employee training expenses in 5 U.S.C. 4108.