Interests in land validly created or arising after the commencement of this Act, which are not capable of subsisting as legal estates, shall take effect as equitable interests, and, save as otherwise expressly provided by statute, interests in land which under the Statute of Uses or otherwise could before the commencement of this Act have been created as legal interests, shall be capable of being created as equitable interests:
All rights and interests in land may be disposed of, including—
a contingent, executory or future equitable interest in any land, or a possibility coupled with an interest in any land, whether or not the object of the gift or limitation of such interest or possibility be ascertained;
a right of entry, into or upon land whether immediate or future, and whether vested or contingent.
All rights of entry affecting a legal estate which are exercisable on condition broken or for any other reason may after the commencement of this Act, be made exercisable by any person and the persons deriving title under him....