7 C.F.R. § 3.71
As used in this subpart the following definitions will apply:
Disposable pay means that part of current basic pay, special pay, incentive pay, retired pay, retainer pay, or in the case of an employee not entitled to basic pay, other authorized pay remaining after the deduction of any amount required by law to be withheld (other than deductions to execute garnishment orders in accordance with 5 CFR parts 581 and 582 ) . Among the legally required deductions that must be applied first to determine disposable pay are levies pursuant to the Internal Revenue Code (title 26, United States Code) and deductions described in 5 CFR 581.105(b) through (f) .
Salary offset means a reduction of a debt by offset(s) from the disposable pay of an employee without his or her consent.
Waiver means the cancellation, remission, forgiveness, or non-recovery of a debt owed by an employee to an agency as permitted or required by 5 U.S.C. 5584 , 10 U.S.C. 2774 , or 32 U.S.C. 716 , 5 U.S.C. 8346(b) , or any other law.
7 C.F.R. §3.71