New York Criminal Procedure Law Section 430.10 - Sentence of imprisonment not to be changed after commencement.

430.10  Sentence of imprisonment not to be changed after commencement.
Except as otherwise specifically authorized by law, when the court has
  imposed  a  sentence  of imprisonment and such sentence is in accordance
  with law, such sentence may not be  changed,  suspended  or  interrupted
  once the term or period of the sentence has commenced.

Last modified: February 3, 2019