What is the meaning of fee simple subject to a condition subsequent?

fee simple subject to a condition subsequent is a fee simple subject to a condition subsequent is an estate conveyed "provided that" "on the condition that" or "if" it is used for a specific purpose. If it is no longer used for that purpose, it reverts to the original grantor or his heirs. This type of estate is much the same as a fee determinable, except that in a fee determinable conveyance, the words are of duration while a fee condition subsequent refers strictly to a specific condition. In addition, unlike a fee determinable, when fee condition subsequent property is no longer used for its prescribed purpose, the original grantor (or heirs) must physically retake possession of the property within a reasonable period of time after the breach (i. E., the grantor must exercise his or her right of reentry). Any transaction involving a fee simple defeasible estate should be referred to an attorney for a professional opinion.