The parcel of land in the Schedule hereto described shall, from and after the passing of this Act, be no longer held by the University exclusively for the purpose in the said Act set forth, but the University shall have full power to let or demise the same by public auction or tender, as it may from time to time deem desirable, upon building or other leases, upon such terms as the University shall think fit: Provided that any lease of the said parcel of land, or of any part thereof, shall not be for more than twenty-one years from the time when such lease shall be made, and in and by such lease there shall be reserved the highest rent that can be reasonably obtained for the lands, tenements, or hereditaments thereby demised, without fine or premium.