New York Mental Hygiene Law Section 91.03 - Savings clause.

91.03 Savings clause.
Nothing  contained in this chapter or any act amendatory thereof shall
  affect or impair the validity of any act done or right accruing, accrued
  or acquired, or any order, judgment, or status established prior to  the
  enactment  of  this  chapter  or  prior  to  the  enactment  of  any act
  amendatory thereof.  Persons  admitted  or  certified  pursuant  to  the
  provisions  of article six or article seven of the mental hygiene law as
  it existed prior to the  enactment  of  this  chapter  may  be  retained
  pursuant to the provisions of the respective articles but in no event to
  exceed a period of two years from the effective date of this chapter.

Last modified: February 3, 2019