New York Consolidated Laws, Real Property Law - RPP § 374. Deputy registrars' powers and duties

In any county where the business under this article so warrants, the registrar may appoint a chief deputy and as many other deputies as are needed.  But no one unless he is also a deputy register or an assistant deputy register appointed under statutory authority, or a deputy county clerk, shall be appointed as such deputy registrar unless he has qualified as an official examiner of title as described and required by section three hundred and seventy-seven of this chapter.

Deputies may perform any and all duties of the registrar in the name of the registrar, and the acts of such deputies shall be held to be the acts of the registrar, and in case of the death of the registrar, or his removal from office, the chief deputy shall thereupon become the acting registrar until such vacancy shall be filled according to law, and he shall file a like bond and be vested with the same powers and subject to the same responsibilities and entitled to the same compensation as in the case of the registrar.