Two (2) or more future interests may be created to take effect in the alternative; so that if the first in order fails to vest, the next in succession shall be substituted for it, and take effect accordingly.
Idaho Code § 55-107
Two (2) or more future interests may be created to take effect in the alternative; so that if the first in order fails to vest, the next in succession shall be substituted for it, and take effect accordingly.
Idaho Code § 55-107