Definitions of conditional devise
a gift of real or immovable property left in a will by someone who has died which is dependent on the happening of some uncertain event
To create a conditional devise within a will, a testator (=person who died leaving a will) must use clear and explicit language.
Phrase Bank for conditional devise
The rationale for finding a charge on the estate is especially strong when, as in this case, a conditional devise of real property is involved.
…the devise, in all these cases, is a good conditional devise
In effect, the clause creates a conditional devise , given only if the will is not challenged.