law: Copyright Act, 1957 
  22. Term of copyright in published literary,
  
  dramatic, musical and artistic works – 
  Except as otherwise hereinafter provided,
  
  copyright shall subsist in any literary, dramatic, musical or artistic work
  
  (other than a photograph) published within the lifetime of the author until [(Note:
  
  Subs. by Act No.13 of 1992, S.2, w.e.f. 28-12-1991. In this regard S.3 of Act
  
  No.13 of 1992 reads: "3. Copyright not to subsist if term has expired -
  
  For the removal of doubts, it is hereby declared that copyright shall not subsist
  
  by virtue of this Act in any work in which copyright did not subsist
  
  immediately before the commencement of this Act.") sixty years] from
  
  the beginning of the calendar year next following year in which the author
  
  dies.
  Explanation –  In this section the
  
  reference to the author shall, in the case of a wok of joint authorship, be
  
  construed as a reference to the author who dies last.