N.Y. Comp. Codes R. & Regs. tit. 20, § 74.5
(a) As a supplement to the tax imposed on cigarettes possessed in New York State for sale, article 20 of the Tax Law also imposes a tax on cigarettes possessed in the State for purposes other than sale. Except as provided for in this section, the cigarette use tax is imposed and must be paid on all cigarettes used in the State by any person. As defined in section 70.2(d) of this Title, a use of cigarettes constitutes the exercise of any right or power, actual or constructive, with respect to cigarettes, but does not include possession for sale. Accordingly, the cigarette tax imposed upon cigarettes used in the State is a complement to the tax imposed on cigarettes possessed for sale in the State and all of the provisions of article 20 of the Tax Law and this Title regarding the latter tax, if not inconsistent with this section, shall apply to the administration and enforcement of the use tax in the same manner as if the language of said provisions had been incorporated in full into this section.
(b)
(c) No cigarette use tax shall be imposed on cigarettes used in the State, if:
(3) the number of cigarettes brought into the State on, or in the possession of, any person does not exceed 400.
Where a use of cigarettes involves more than 400 cigarettes brought into the State on, or in the possession of, any person, all such cigarettes are subject to tax. Furthermore, where cigarettes are brought into the State other than on, or in the possession of, the user of such cigarettes (e.g., cigarettes delivered into the State by mail) all such cigarettes are taxable.
Tax Law, §§ 471-a, 475 and 1814