2006 New York Code - Authorized Systems Of Weights And Measures; Basic Units.

 
    § 177. Authorized systems of weights and measures; basic units. 1. The
  metric  system  of  weights  and  measures and the system of weights and
  measures in customary use in the United States are  jointly  recognized,
  and  either  system shall be used for all commercial purposes within the
  state. However, the International Metric System ("SI"),  as  defined  in
  the  Metric  Conversion Act of nineteen hundred seventy-five (Public Law
  94-168) and as such definition  may  hereafter  be  amended,  is  hereby
  adopted as the preferred system within the state.
    2. The definitions of basic units of weight and measure, the tables of
  weight and measure, and weights and measures equivalents as published by
  the  national  bureau  of  standards  or its successor organization, the
  national institute of standards and technology,  of  the  United  States
  department  of  commerce  are  recognized  and shall govern weighing and
  measuring equipment and transactions in the state.