Section 2--309. Absence of Specific Time Provisions; Notice of Termination

(1) The time for shipment or delivery or  any  other  action  under  a
  contract  if  not  provided  in  this  Article or agreed upon shall be a
  reasonable time.
    (2) Where the contract provides for  successive  performances  but  is
  indefinite  in  duration  it  is  valid for a reasonable time but unless
  otherwise agreed may be terminated at any time by either party.
    (3) Termination of a contract by one party except on the happening  of
  an agreed event requires that reasonable notification be received by the
  other  party and an agreement dispensing with notification is invalid if
  its operation would be unconscionable.