Notwithstanding any other provision of law, a Federal income tax return of, or the payment of a Federal income tax by, a member of a uniformed service who, at the time the return or payment would otherwise become due, is in a missing status, does not become due until the earlier of the following dates—
((1)) the fifteenth day of the third month in which he ceased (except by reason of death or incompetency) being in a missing status, unless before the end of that fifteenth day he is again in a missing status; or
((2)) the fifteenth day of the third month after the month in which an executor, administrator, or conservator of the estate of the taxpayer is appointed.