Sec. 71.004.  PRESUMPTION OF DEATH WITHOUT HEIRS.  An individual is presumed to have died leaving no heirs if for the seven-year period preceding the court's determination:
(1)  a lawful claim to the individual's property has not been asserted;  and
(2)  a lawful act of ownership of the individual's property has not been exercised.
Acts 1983, 68th Leg., p. 3585, ch. 576, Sec. 1, eff. Jan. 1, 1984.