29 CFR 102.157: Definitions.

(a) The term administrative offset means the withholding of money payable by the United States to, or held by the United States on behalf of, a person to satisfy a debt owed the United States by that person.

(b) The term debtor is any person against whom the Board has a claim.

(c) The term person does not include any agency of the United States, or any state or local government.

(d) The terms claim and debt are synonymous and interchangeable. They refer to an amount of money or property which has been determined by an appropriate Agency official to be owed to the United States from any person, organization, or entity, except another Federal agency.

(e) A debt is considered delinquent if it has not been paid by the date specified in the Agency's initial demand letter (§ 102.161), unless satisfactory payment arrangements have been made by that date, or if, at any time thereafter, the debtor fails to satisfy the debtor's obligations under a payment agreement with the Agency.