2015 New York Laws
NPC - Not-For-Profit Corporation
Article 6 - (Not-For-Profit Corporation) MEMBERS
606 - Waivers of notice.

606. Waivers of notice.
Notice of meeting need not be given to any member who submits a waiver
  of  notice,  in person or by proxy, whether before or after the meeting.
  Waiver of notice may be written or electronic. If  written,  the  waiver
  must  be  executed  by  the  member  or the member's authorized officer,
  director, employee, or agent by signing such waiver or  causing  his  or
  her  signature  to  be  affixed  to such waiver by any reasonable means,
  including, but not limited to facsimile signature.  If  electronic,  the
  transmission  of  the  waiver  must  be  sent by electronic mail and set
  forth, or be submitted with, information from which it can reasonably be
  determined that the transmission  was  authorized  by  the  member.  The
  attendance  of  any  member at a meeting, in person or by proxy, without
  protesting prior to the conclusion of the meeting the lack of notice  of
  such meeting, shall constitute a waiver of notice by him or her.