After bedikas chometz on the 14th of Nissan by night and again on the 14th of Nissan by day we are "m'vatel" (nullify) all of the chometz in our reshus (property.)
Can a person say already any time before the 14th of Nissan that on the 14th of Nissan all of his chometz should be buttel. We don't see this "eitzah" (solution) spoken about in the poskim and seems clear that we do it on the 14th. However why is one not able to be m'vatel the chometz already from before the time by making this declaration?