NY Gen Oblig L § 15-301 (2021)
2021 New York Laws GOB - General Obligations Article 15 - Modification and Discharge of Obligations Title 3 - Requirements for Effectiveness or Enforceability of Modification or Discharge 15-301 - When Written Agreement or Other Instrument Cannot Be Changed by Oral Executory Agreement, or Discharged or Terminated by Oral Executory Agreement or O

§ 15-301. When written agreement or other instrument cannot be changed   by  oral  executory  agreement,  or  discharged  or  terminated  by oral   executory agreement or oral consent or by  oral  notice.  1.  A  written   agreement  or other written instrument which contains a provision to the   effect that it cannot  be  changed  orally,  cannot  be  changed  by  an   executory  agreement  unless  such executory agreement is in writing and   signed by the party against whom enforcement of the change is sought  or   by his agent.2.  A  written  agreement or other written instrument which contains a   provision to the effect that it cannot be terminated orally,  cannot  be   discharged  by an executory agreement unless such executory agreement is   in writing and signed by the  party  against  whom  enforcement  of  the   discharge is sought, or by his agent, and cannot be terminated by mutual   consent  unless  such  termination is effected by an executed accord and   satisfaction other than the substitution of one executory  contract  for   another,  or  is evidenced by a writing signed by the party against whom   it is sought to enforce the termination, or by his agent.3. a. A discharge or partial discharge of obligations under a  written   agreement  or  other  written instrument is a change of the agreement or   instrument for the purpose of subdivision one of this section and is not   a discharge or termination for the purpose of  subdivision  two,  unless   all   executory  obligations  under  the  agreement  or  instrument  are   discharged or terminated.b. A discharge or termination of all  executory  obligations  under  a   written  agreement  or  other  written  instrument  is  a  discharge  or   termination for the purpose  of  subdivision  two  even  though  accrued   obligations  remaining  unperformed  at  the  date  of  the discharge or   termination are not affected by it.c. If a written agreement or other  written  instrument  containing  a   provision  that  it  cannot  be  terminated  orally  also  provides  for   termination or  discharge  on  notice  by  one  or  either  party,  both   subdivision  two  and  subdivision four of this section apply whether or   not the agreement or  other  instrument  states  specifically  that  the   notice must be in writing.4.  If  a  written  agreement  or  other written instrument contains a   provision for termination or discharge  on  written  notice  by  one  or   either  party,  the requirement that such notice be in writing cannot be   waived except by a writing signed by the party against whom  enforcement   of the waiver is sought or by his agent.5.  If  executed  by an agent, any agreement, evidence of termination,   notice of termination or waiver, required  by  this  section  to  be  in   writing,  which  affects  or  relates  to  real  property or an interest   therein as defined in section 5-101 in any manner stated in subdivisions   one or two of section 5-703 of this chapter shall be  void  unless  such   agent was thereunto authorized in writing.6.  As  used in this section the term "agreement" includes promise and   undertaking.