20 CFR § 222.15
When spouse is living with employee
February 18, 2021
A spouse, or widow(er) is living with the employee if—
(a) He or she and the employee are living in the same household; or
(b) The employee is contributing to the support of the spouse or widow(er); or
(c) The employee is under court order to contribute to the support of the spouse or widow(er).