20 C.F.R. § 416.1832

When we consider your marriage ended.

        We consider your marriage ended when—

        (a) Your spouse dies;

        (b) Your divorce or annulment becomes final;

        (c) We decide that either of you is not a spouse of the other for purposes of husband's or wife's social security insurance benefits, if we considered you married only because of § 416.1806(a)(2); or

        (d) You and your spouse stop living together, if we considered you married only because of § 416.1806(a)(3).

[45 FR 71795, Oct. 30, 1980. Redesignated at 46 FR 29211, May 29, 1981; 46 FR 42063, Aug. 19, 1981, as amended at 60 FR 16376, Mar. 30, 1995]

Official source