A spouse's inclusion in the computation of the overall minimum rate ends the earlier of:
(a) The month before the month in which the spouse dies; or
(b) The month before the month in which the spouse's marriage to the employee legally terminates; or
(c) If the spouse has an eligible child in care, the earlier of the month before the month in which the child leaves the spouse's care, attains age 16 and is not disabled, or, if disabled, recovers from being disabled; or
(d) The month before the month the employee dies.