to the third party taking possession. Example: "O grants Blackacre to A for life, then to B". Analysis (A): A has a life estate. Analysis (B): B has a vested remainder, because Blackacre will vest in B after A dies, with no further conditions. Alienation: B may divest his (absolutely) vested remainder, which is not subject to the rule against perpetuities. A is subject to the rules regarding divestiture of a life estate, as noted above. Question: If B dies before A, who takes possession upon A's death? Answer: B's estate. The terms "and his heirs" are assumed to be part of the conveyance. Vested remainders subject to open Example: "O grants Blackacre to A for life, then to B's children". Analysis: The class of B's children can't be determined until approximately thirty-eight weeks after A dies, so any children who are unborn at the time of the grant have a remainder contingent upon B having offspring. Children of B are fully vested as soon as they are born, provided A is still alive. B's children who are born have vested remainder subject to open, because the conveyance was given to a class of persons (B's Children) and B could still have more children. If A dies before B, then the class is closed, and only those children alive at A's death will have an interest. Vested remainders subject to total divestment Example: "O grants Blackacre to A for life, then to B if B is married to C (at the time A dies)". Analysis (O): If B is married to C when A dies, B will own Blackacre. If B isn't married to C, then the property will vest in O (or O's estate) without O having to make a claim for it. So O has a reversion. Analysis (A): A has a life estate. Analysis (B): B has a contingent remainder subject to condition precedent, because Blackacre will vest in B, but only if B is married to C at the moment A dies. Alienation: B does not vest unless he is married to C at the moment of A's death. In other words, he will have to wait until A dies to divest. Note: a different result would be reached if the grant was "O to A for life, then to B if B has married C". In this case, B could marry C to obtain a