(1)  A will or part of a will that has been revoked is revived by re-execution or by execution of a will showing an intention to revive the will or part.

(2)  A revival of a will that was partly revoked and later revoked as to the balance only revives that part of the will most recently revoked.

(3)  Subsection (2) does not apply if a contrary intention appears in the reviving will.

(4)  A will that has been revoked and later revived, either wholly or partly, is taken to have been executed on the date on which the will is revived.