upon nonpayment, or untimely payment, of a required Monthly Coverage Payment (for the Participant and all Dependents, effective immediately before the first day of the month for which the payment would have applied);
upon the adoption of any Plan amendment that terminates the Covered Individual's coverage (as the amendment provides);
the date any family member enrolls in a Medicare Part D program outside this Plan (as provided in Section 4.5(d));
upon the failure of any Covered Individual to abide by the Plan's provisions (such as the commission of fraud or material misrepresentation) that results in a forfeiture of coverage (for the Covered Individual and his or her covered Dependents, effective immediately); and
upon affirmative disenrollment by the Participant.