A devisee who does not survive the testator by 120 hours is treated as if the devisee predeceased the testator unless the testator's will contains some language that:
(1) deals explicitly with simultaneous death or deaths in a common disaster; or
(2) requires the devisee to survive the testator, or to survive the testator for a stated period, to take under the will.
Official text of the Texas Estates Code as published by the Texas Legislative Council.