New York Laws
Part 3 - Estates Classified as to Time of Enjoyment and Creation
6-3.3 - Concerning the Creation of Certain Future Estates

(a) Subject to the provisions of article 9:
(1) An estate may be created to commence at a future time.
(2) An estate for life may be created in a term of years and a future
estate limited thereon.
(3) A future estate may be limited after a term of years, provided
that, if such future estate is subject to a condition precedent, the
condition must occur within the period prescribed by article 9.
(4) A fee or a lesser estate may be limited on a fee, subject to a
condition precedent which must occur within the period prescribed by
article 9.