5 C.F.R. § 845.305 Ordinary and necessary living expenses.
Title 5 - Administrative Personnel
An individual's ordinary and necessary living expenses include rent, mortgage payments, utilities, maintenance, transportation, food, clothing, insurance (life, health, and accident), taxes, installment payments, medical expenses, support expenses for which the annuitant is legally responsible, and other miscellaneous expenses that the individual can establish as being ordinary and necessary.
Title 5: Administrative Personnel
PART 845—FEDERAL EMPLOYEES RETIREMENT SYSTEM—DEBT COLLECTION
Subpart C—Standards for Waiver of Overpayments
§ 845.305 Ordinary and necessary living expenses.