(b) Upon payment of the required fee, a dealer shall be entitled to receive one or more number plates which may be used in lieu of any registration issued under section four hundred one of this chapter for the operation of any boat trailer owned or controlled by the dealer and held for the purpose of sale or demonstration, provided such operation is directly related to the sale or demonstration of any boat trailer or vessel. The provisions of section four hundred two of this chapter with respect to the care and display of number plates shall apply to number plates issued under this subdivision.

(c) The commissioner may, in his discretion, limit the number of demonstrator numbers or number plates which shall be issued to any registrant. The fee for the replacement of lost, mutilated, or destroyed demonstrator numbers or number plates shall be two dollars. 5. Fees. Every application, other than a renewal application, shall be accompanied by an application fee of ten dollars, which shall in no event be refunded. The triennial fee for such registration or renewal thereof shall be seventy-five dollars. The triennial fee for demonstrator numbers or number plates shall be sixty dollars for each number or number plate. The application for registration, demonstrator numbers and number plates shall be accompanied by the required fees. There shall be no refund of any registration fee or any fee for demonstrator numbers or number plates. 6. No dealer shall sell a vessel except in accordance with regulations established by the commissioner. The commissioner may, in his discretion, require a registrant to maintain a record in a prescribed form of all vessels received or disposed of by him. Upon request of an agent of the commissioner or of any peace officer acting pursuant to his special duties, a registrant shall produce such records and permit said agent or peace officer to examine them, and any vessels on the premises subject to the record keeping requirements of this section during usual business hours or while the registrant is conducting business. The failure to produce such records or to permit such inspection as required by this subdivision shall be a violation.