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Requirements For Effectiveness or Enforceability of Modification or Discharge

N.Y. Gen. Oblig. Law § 15-301— When written agreement or other instrument cannot be changed by oral executory agreement, or discharged or terminated by oral executory a..
N.Y. Gen. Oblig. Law § 15-303— Release in writing without consideration or seal
N.Y. Gen. Oblig. Law § 15-304— Forfeiture and cancellation of oil, gas or mineral land leases