5 CFR 550.402 - Definitions.
Domestic partnership means a committed relationship between two adults of the same sex in which the partners -
(1) Are each other's sole domestic partner and intend to remain so indefinitely;
(2) Maintain a common residence, and intend to continue to do so (or would maintain a common residence but for an assignment abroad or other employment-related, financial, or similar obstacle);
(4) Share responsibility for a significant measure of each other's financial obligations;
(5) Are not married or joined in a civil union to anyone else;
(6) Are not the domestic partner of anyone else;
(7) Are not related in a way that, if they were of opposite sex, would prohibit legal marriage in the U.S. jurisdiction in which the domestic partnership was formed;
(8) Are willing to certify, if required by the agency, that they understand that willful falsification of any documentation required to establish that an individual is in a domestic partnership may lead to disciplinary action and the recovery of the cost of benefits received related to such falsification, as well as constitute a criminal violation under 18 U.S.C. 1001, and that the method for securing such certification, if required, will be determined by the agency; and
Family member means an individual with any of the following relationships to the employee:
(1) Spouse, and parents thereof;
(2) Sons and daughters, and spouses thereof;
(3) Parents, and spouses thereof;
(4) Brothers and sisters, and spouses thereof;
(5) Grandparents and grandchildren, and spouses thereof;
(7) Any individual related by blood or affinity whose close association with the employee is the equivalent of a family relationship.
United States means the 50 States, the District of Columbia, the Commonwealths of Puerto Rico and the Northern Mariana Islands, and any territory or possession of the United States.