Section 2 Demise made before passing this Act not valid unless the rents reserved be equal to or more than the rents accustomably reserved, &c.

Provided always, that nothing herein contained shall extend to confirm or render valid any demise made before the passing of this Act, unless the several rents reserved upon the separate demises of separate parts of tenements, theretofore accustomably demised under one entire lease, shall be equal to or more than the rent or rents theretofore accustomably reserved on the entire demise of the whole; or in case the whole should not be demised, but part reserved in the possession of the lessor or lessors, unless the rents reserved on the parts demised should be so far equal to or more than the whole amount of the ancient rent or rents, that the part not demised should be sufficient to answer the difference.