1. A right in land may be cut off by a condition subsequent . 2. It makes it of no effect, at any rate when it is a condition subsequent . 3. The right of entry is not automatic, but rather must be exercised to terminate the fee simple subject to condition subsequent . 4. A war automatically arising upon a condition subsequent , pursuant to a treaty provision, is not a war declared by Congress. 5. A "'condition subsequent "'is an event or state of affairs that brings an end to something else. 6. When land rights are subject to a condition subsequent , this creates a defeasable fee called a Fee simple subject to condition subsequent. 7. When land rights are subject to a condition subsequent, this creates a defeasable fee called a Fee simple subject to condition subsequent . 8. A condition subsequent is often used in a legal context as a marker bringing an end to one's legal rights or duties. 9. Two other techniques to prevent the assignment of contracts are " rescission clauses " or clauses creating a " condition subsequent ". 10. A condition subsequent may be either an event or a state of affairs that must either ( 1 ) occur or ( 2 ) fail to continue to occur.