law: Trade Marks Act, 1999  
  33. Effect of acquiescence.- 
  (1) Where the proprietor of an earlier trade
  
  mark has acquiesced for a continuous period of five years in the use of a
  
  registered trade mark, being aware of that use, he shall no longer be entitled
  
  on the basis of that earlier trade mark- 
  (a) to apply for a
  
  declaration that the registration of the later trade mark is invalid, or
  (b) to oppose the use
  
  of the later trade mark in relation to the goods or services in relation to
  
  which it has been so used, unless the registration of the later trade mark was
  
  not applied in good faith.
  (2) Where sub-section (1) applies, the
  
  proprietor of the later trade mark is not entitled to oppose the use of the
  
  earlier trade mark, or as the case may be, the exploitation of the earlier
  
  right, notwithstanding that the earlier mark may no longer be invoked against
  
  his later trade mark.