A future estate is created when the disposition creating it becomes
legally effective.
Structure New York Laws
EPT - Estates, Powers and Trusts
Article 6 - Classification, Creation, Definition Of, and Rules Governing Estates in Property
Part 3 - Estates Classified as to Time of Enjoyment and Creation
6-3.1 - Estates in Possession and Future Estates
6-3.2 - Kinds of Future Estates