New York Consolidated Laws, Tax Law - TAX § 960-a. Reciprocity

The tax imposed by this article in respect of personal property (except tangible personal property having an actual situs in this state) shall not be payable if the transferor is a resident of a state or territory of the United States the laws of which, at the time of the transfer, contained a reciprocal provision under which nonresidents were exempted from transfer taxes or death taxes of every character in respect of personal property (except tangible personal property having an actual situs therein) provided the state or territory of residence of such nonresident allowed a similar exemption to residents of the state or territory of residence of such transferor.  For the purposes of this section, the District of Columbia and the Commonwealth of Puerto Rico shall be considered territories of the United States.