N.Y. Veh. & Traf. Law § 122-b

§ 122-b. Maximum performance speed. For the purposes of article\nforty-eight-A of this chapter, maximum performance speed shall be the\ngreatest speed which can be attained and maintained by a limited use\nvehicle under conditions prescribed by the commissioner at the time of\nits manufacture, as certified by the manufacturer and filed with and\naccepted by the commissioner. The maximum performance speed of a limited\nuse vehicle shall remain as certified regardless of any modification\nmade to such vehicle after such certification.\n