N.Y. Comp. Codes R. & Regs. tit. 15, § 29.4
(3) A registration transaction will be rejected when the proper fee is not presented, or when the registrant indicates that the tax does not apply to him/her but refuses to sign an exemption certificate.
(b) Original applications.
(2) In order for an exemption from the collection of the tax to be granted, an exemption certificate (UT-11C) will be required to be submitted for those transactions for which the tax would ordinarily be due.
(c) Renewals.
(3) If the registrant indicates that s/he is required to pay the tax but the amount was not preprinted, the issuing office will amend the registration record to correct the county field and the tax will be charged.
(d) Refunds for certain unused registrations.
When any annual fee paid for the registration of a motor vehicle is refunded by DMV in accordance with section 428 of the Vehicle and Traffic Law, the amount of any county use tax paid upon such registration shall also be refunded by the commissioner.
(a) Administrative considerations.
To implement the collection of this tax, the following administrative procedures will be used: