Contingent remainders subject to a condition precedent (prerequisite)
Condition precedent when it appears before the language creating the remainder or is woven into grant to remainderman.
“To A for life, then, if B graduates from college, to B.” A is alive. B is now in high school. Before B can take, he must graduate from college. He has not yet satisfied this condition precedent. B has a contingent remainder, but if he graduates from college during A’s lifetime: it automatically becomes an indefeasibly vested remainder.