(1)  A  lease  contract  imposes  an obligation on each party that the
other's expectation of receiving due performance will not be impaired.
  (2) If reasonable grounds for insecurity arise  with  respect  to  the
performance  of  either  party, the insecure party may demand in writing
adequate assurance of due performance. Until the insecure party receives
that assurance,  if  commercially  reasonable  the  insecure  party  may
suspend any performance for which he or she has not already received the
agreed return.
  (3)  A  repudiation  of  the lease contract occurs if assurance of due
performance adequate under the circumstances of the particular  case  is
not  provided  to  the  insecure  party within a reasonable time, not to
exceed thirty days after receipt of a demand by the other party.
  (4) Between merchants, the reasonableness of  grounds  for  insecurity
and  the  adequacy of any assurance offered must be determined according
to commercial standards.
  (5) Acceptance of any  nonconforming  delivery  or  payment  does  not
prejudice  the  aggrieved  party's right to demand adequate assurance of
future performance.
Structure New York Laws
Part 4 - Performance of Lease Contract: Repudiated, Substituted and Excused
2-A-401 - Insecurity: Adequate Assurance of Performance.
2-A-402 - Anticipatory Repudiation.
2-A-403 - Retraction of Anticipatory Repudiation.
2-A-404 - Substituted Performance.
2-A-405 - Excused Performance.