law: Indian Stamp Act, 1899 
  7. Policies of sea-insurance 
   22  [* * *]
  (4) Where any sea-insurance is made for or upon a voyage and
  
  also for time, or to extend to or cover any time beyond thirty days after the
  
  ship shall have arrived at her destination and been there moored at anchor, the
  
  policy shall be charged with duty as a policy for or upon a voyage, and also with
  
  duty as a policy for time.