2. A possible future event, which will trigger the duty to perform a legal obligation or will cause a real property interest to arise, vest or be extinguished.
CONDITION PRECEDENT an act or event that must occur before a duty of immediate performance of a promise arises, or before a real property interest will arise or vest.
CONDITION SUBSEQUENT a fact that will extinguish a duty to make compensation for BREACH OF CONTRACT after the breach has occurred, or whose occurrence will result in the extinguishment of an interest in real property
