234. Nature of interest.

A lease or underlease, at a rent or in consideration of a fine (or premium), for life or lives, or for any term of years determinable with life or lives, or on the marriage of the lessee, or on the formation of a civil partnership between the lessee and another person, or any contract for such a lease or underlease, whenever made, takes effect1 as a lease, underlease, or contract for such a lease or underlease, for a term of 90 years determinable after (as the case may be) the death or marriage of, or the formation of a