2006 New York Code - Maximum Performance Speed.

 
    § 122-b. Maximum  performance  speed.  For  the  purposes  of  article
  forty-eight-A of this chapter, maximum performance speed  shall  be  the
  greatest  speed  which  can  be attained and maintained by a limited use
  vehicle under conditions prescribed by the commissioner at the  time  of
  its  manufacture,  as  certified  by the manufacturer and filed with and
  accepted by the commissioner. The maximum performance speed of a limited
  use vehicle shall remain as certified  regardless  of  any  modification
  made to such vehicle after such certification.