jdubois is right, as usual. One small addendum - there are also exemptions in the NYS Penal Law for non-resident handgun possession under other, specific circumstances. I don't think any of them will help you, but I post them here in case any they might be helpful to others who happen upon this thread. (Penal Law text taken from here
http://law.onecle.com/new-york/penal/PEN0265.20_265.20.html )
§ 265.20 Exemptions.
a. Sections 265.01, 265.02, 265.03, 265.04, 265.05, 265.10, 265.11,
265.12, 265.13, 265.15 and 270.05 shall not apply to:
[SNIP]
12. Possession of a pistol or revolver by a person who is a member or
coach of an accredited college or university target pistol team while
transporting the pistol or revolver into or through New York state to
participate in a collegiate, olympic or target pistol shooting
competition under the auspices of or approved by the national rifle
association, provided such pistol or revolver is unloaded and carried in
a locked carrying case and the ammunition therefor is carried in a
separate locked container.
13. Possession of pistols and revolvers by a person who is a
nonresident of this state while attending or traveling to or from, an
organized competitive pistol match or league competition under auspices
of, or approved by, the National Rifle Association and in which he is a
competitor, within forty-eight hours of such event or by a person who is
a non-resident of the state while attending or traveling to or from an
organized match sanctioned by the International Handgun Metallic
Silhouette Association and in which he is a competitor, within
forty-eight hours of such event, provided that he has not been
previously convicted of a felony or a crime which, if committed in New
York, would constitute a felony, and further provided that the pistols
or revolvers are transported unloaded in a locked opaque container
together with a copy of the match program, match schedule or match
registration card. Such documentation shall constitute prima facie
evidence of exemption, providing that such person also has in his
possession a pistol license or firearms registration card issued in
accordance with the laws of his place of residence. For purposes of this
subdivision, a person licensed in a jurisdiction which does not
authorize such license by a person who has been previously convicted of
a felony shall be presumed to have no prior conviction. The
superintendent of state police shall annually review the laws of
jurisdictions within the United States and Canada with respect to the
applicable requirements for licensing or registration of firearms and
shall publish a list of those jurisdictions which prohibit possession of
a firearm by a person previously convicted of a felony or crimes which
if committed in New York state would constitute a felony.
13-a. Except in cities not wholly contained within a single county of
the state, possession of pistols and revolvers by a person who is a
nonresident of this state while attending or traveling to or from, an
organized convention or exhibition for the display of or education about
firearms, which is conducted under auspices of, or approved by, the
National Rifle Association and in which he is a registered participant,
within forty-eight hours of such event, provided that he has not been
previously convicted of a felony or a crime which, if committed in New
York, would constitute a felony, and further provided that the pistols
or revolvers are transported unloaded in a locked opaque container
together with a copy of the convention or exhibition program, convention
or exhibition schedule or convention or exhibition registration card.
Such documentation shall constitute prima facie evidence of exemption,
providing that such person also has in his possession a pistol license
or firearms registration card issued in accordance with the laws of his
place of residence. For purposes of this paragraph, a person licensed in
a jurisdiction which does not authorize such license by a person who has
been previously convicted of a felony shall be presumed to have no prior
conviction. The superintendent of state police shall annually review the
laws of jurisdictions within the United States and Canada with respect
to the applicable requirements for licensing or registration of firearms
and shall publish a list of those jurisdictions which prohibit
possession of a firearm by a person previously convicted of a felony or
crimes which if committed in New York state would constitute a felony.
