29 C.F.R. § 1650.110 Duration of deductions.
Title 29 - Labor
Debts will be collected in one lump sum when possible. If the employee is financially unable to pay in one lump sum or the amount of debt exceeds 15 percent of the employee's disposable pay for an officially established pay interval, collection by offset will be made in installments. Such installment deductions will be made over a period not greater than the anticipated period of active duty or employment of the employee, as the case may be, except as provided in §1600.735–513 and §1600.735–514 of this subpart.
Title 29: Labor
PART 1650—DEBT COLLECTION
Subpart A—Procedures for the Collection of Debts by Salary Offset
§ 1650.110 Duration of deductions.