Where, on a transfer of property, an interest therein is created in favour of such members only of a class as shall attain a particular age, such interest does not vest in any member of the class who has not attained that age.

Where, on a transfer of property, an interest therein is created in favour of such members only of a class as shall attain a particular age, such interest does not vest in any member of the class who has not attained that age.