N.Y. Comp. Codes R. & Regs. tit. 20, § 474.6
(b) A permit issued to the owner of a motor vehicle may be surrendered and the sticker destroyed when the motor vehicle is leased for a period of more than 30 consecutive days under a lease or agreement granting direct control thereof to the lessee in order to relieve the owner of the necessity of including that vehicle in his tax returns. Similarly, after a permit and sticker are issued for a motor vehicle, if the motor vehicle becomes exempt from the provisions of article 21 of the Tax Law, the permit may be surrendered and the sticker destroyed, thus relieving the carrier thereof of the necessity of including that vehicle in his tax returns. (See section 484.2 of this Title.)
Example:
A farmer has obtained a permit and sticker for a truck which he operates to carry produce from farms not contiguous to his own. The truck will no longer carry such produce but will be used exclusively for one of the purposes set forth in section 471.5 of this Title. The permit may be surrendered, and the sticker destroyed at the end of the month in which he stops carrying produce from other farms.
Tax Law, § 502