this case. While so-called "formal declarations” of domicile such as voter registration or motor vehicle registration have lost their importance in recent years as courts have recognized their self-serving nature, the "informal declarations” and acts of the person have been given greater recognition in resolving the question of domicile. (See Restatement, Conflicts 2d, § 20, "Special Note on Evidence for Establishment of a Domicil of Choice”, pp 81-83;
Matter of Bourne, 181 Mise 238, affd 267 App Div 867 , affd
293 NY 785 .) Among these "informal acts” include the fact that defendant took a job and entered into a renewable contract of employment, signed a lease for an apartment, and made statements to the effect that she had no intention of returning to New York. With such a showing, defendant has sustained her burden of proof. We therefore conclude that the service by mail upon the defendant was void as she was no longer a domiciliary of the State of New York at the time of service. In his second point on this appeal, plaintiff argues that article 5-A of the Domestic Relations Law, the Uniform Child Custody Jurisdiction Act (the Act), should be applied retroactively so as to enable the New York courts to take jurisdiction over the person of the defendant. Such retroactive application would be necessary as the events in this case occurred in early 1977, at a time not only before the Act became effective, but also before the legislation had been passed into law. The precise question of retroactive application of the jurisdictional components of the Act is one of first impression for the appellate courts of this State. However, a clear analogy may be drawn to the circumstances surrounding the passage and effect of CPLR 302, the "long-arm” jurisdiction statute. Like the Act, the long-arm statute also extended New York’s reach of personal jurisdiction into areas where it had not heretofore been exercised. Soon after the enactment of CPLR 302, the Court of Appeals was faced with the question of retroactivity in the case of
Simonson v International Bank (
14 NY2d 281 ). The court, per Judge Fuld, stated (p 284): "The primary question presented by this appeal is whether the provisions of the new CPLR (302), effective September 1, 1963, and the principles embodied therein, enlarging the bases for acquiring personal jurisdiction over foreign corporations and nonresident persons, have retroactive application to previously instituted actions.” With respect to the question of retroactivity, the court noted that it is presumed that (p 289) " 'Changes in the form of remedies’, effected by a statute such as this, [are] 'applicable to proceedings thereafter instituted for the redress of wrongs already done.’ ” However, the court went on, stating that (p 289): "different considerations are involved and a 'different problem arises’ * * * 'when proceedings are already pending. There is then a distinction to be noted. The [procedural] change is applicable even then if directed to the litigation in future steps and stages * * *. It is inapplicable, unless in exceptional conditions, where the effect is to reach backward, and nullify by relation the things already done’.” The court continued (p 289): "In other words, while procedural changes are, in the absence of words of exclusion, deemed applicable to
'subsequent proceedings in pending actions’ * * * it takes 'a clear expression of the legislative purpose to justify’ a retrospective application of even a procedural statute so as to affect proceedings
previously taken in such actions.” The court thus concluded (p 290): "it is manifest, despite some lower court cases to the contrary * * * that the new section does not apply to actions instituted prior to its effective date and does not operate, by relation back, to validate an attempted service of process which was jurisdictionally defective when made”. Based on this clear statement of policy proscribing the application of a new jurisdictional act to confer jurisdiction
nunc pro tunc, we hold that the Uniform Child