United States Code
USC most recently checked for updates: Feb 08, 2023
Advancements and deductions
An agency may advance, through the proper disbursing official, to an employee entitled to per diem or mileage allowances under this subchapter, a sum considered advisable with regard to the character and probable duration of the travel to be performed. A sum advanced and not used for allowable travel expenses is recoverable from the employee or his estate by—
setoff against accrued pay, retirement credit, or other amount due the employee;
deduction from an amount due from the United States; and
such other method as is provided by law.
cite as: 5 USC 5705