N.Y. Comp. Codes R. & Regs. tit. 20, § 491.4
(3) An IFTA license and decals issued in accordance with the provisions of article 21-A of the Tax Law and this section, or in accordance with the laws of a carrier's base jurisdiction are separate and distinct from the highway use permits and stickers issued in accordance with the provisions of article 21 of such law and Article 1 of this Subchapter.
(b)
(2) An application for a New York IFTA license and decals must be mailed to the department at the address indicated in the application. The application must be accompanied by the decal fee of four dollars per decal, paid by check or money order, made payable, in United States funds, to the Commissioner of Taxation and Finance. Two IFTA decals are required for each qualified motor vehicle in the carrier's fleet. A carrier may request decals in excess of the number of qualified motor vehicles in such carrier's fleet in order to have decals on hand for any additional qualified motor vehicles added to such carrier's fleet. Provided, however, the carrier must maintain adequate records to verify the uses of such decals. Any unused IFTA decals are not refundable or convertible at the end of the calendar year for which they are issued.
(c)
(3) The IFTA license must be reproduced by the licensee and a reproduction carried in each qualified motor vehicle to be operated in New York State or any other IFTA jurisdiction. The original license should be stored in a secure environment. The decals must be placed on the exterior portion of both sides of the cab. In the case of transporters, manufacturers, dealers, or drive-away operations, the decals need not be permanently affixed, but may be temporarily displayed in a visible manner on both sides of the cab.
(d)
Tax Law, §§ 522 and 528(b)
(a)