N.Y. Estates, Powers & Trusts Law § 13-3.5
representative
(a) A personal or other legal representative of a non-domiciliary decedent, duly appointed or authorized by the law of any other state, territory or other jurisdiction of the United States where the decedent was domiciled, may sue in any court of this state in his capacity as personal or other legal representative in the same manner and under the same restrictions as a person residing outside of the state may sue, subject to the following:
(2) Within ten days after commencing such action or proceeding, the personal or other legal representative shall file an affidavit stating that: