A reservation of a legal estate shall operate at law without any execution of the conveyance by the grantee of the legal estate out of which the reservation is made, or any regrant by him, so as to create the legal estate reserved, and so as to vest the same in possession in the person (whether being the grantor or not) for whose benefit the reservation is made.
A conveyance of a legal estate expressed to be made subject to another legal estate not in existence immediately before the date of the conveyance, shall operate as a reservation, unless a contrary intention appears.
This section applies only to reservations made after the commencement of this Act.