The definition of family member covers a wide range of relationships, including spouse; parents; parents-in-law, children; brothers; sisters; grandparents; grandchildren; step parents; step children; foster parents; foster children; guardianship relationships; same sex and opposite sex domestic partners; and spouses or domestic partners of the aforementioned, as applicable. The list of family members for whom an employee may request donated annual leave under the ELTP may be found at OPM.
See Also
Travel Medical Insurance: Emergency Coverage While You Travel Internationally - NerdWalletMulti-Trip Travel Insurance | Travel InsuranceDefinition: immediate family member from 42 USC § 1320a-7(j)(1) | LIIWhat is group travel insurance, and should you get it instead of a regular travel insurance policy?