law: Negotiable Instruments Act, 1881 
  86. Parties not consenting discharged by qualified or
  
  limited acceptance 
  If the holder of a bill of exchange acquiesces in a qualified acceptance,
  
  or one limited to part of the sum mentioned in the bill, or which substitutes a
  
  different place or time for payment, or which, where the drawees are not
  
  partners, is not signed by all the drawees, all previous parties whose consent
  
  is not obtained to such acceptance are discharged as against the holder and
  
  those claiming under him, unless on notice given by the holder they assent to
  
  such acceptance.
  Explanation:  An acceptance is qualified,- 
  (a) where it is conditional, declaring the payment to be
  
  dependent on the happening of an event therein stated;
  (b) where it undertakes the payment of part only of the sum
  
  ordered to be paid;
  (c) where, no place of payment being specified on the order it
  
  undertakes the payment at a specified place, and not otherwise or elsewhere; or
  
  where, a place of payment being specified in the order, it undertakes the
  
  payment at some other place and not otherwise or elsewhere;
  (d) where it undertakes the payment at a time other than that at
  
  which under the order it would be legally due.