law: Juvenile Justice (Care and Protection of Children) Act, 2000
  49. Presumption and
  
  determination of age.-
  1.     
  
    Where
  
  it appears to a competent authority that person brought before it under any of
  
  the provisions of this Act (otherwise than for the purpose of giving evidence)
  
  is a juvenile or the child, the competent authority shall make due inquiry so
  
  as to the age of that person and for that purpose shall take such evidence as
  
  may be necessary (but not an affidavit) and shall record a finding whether the
  
  person is a juvenile or the child or not, stating his age as nearly as may be.
  2.     
  
    No
  
  order of a competent authority shall be deemed to have become invalid merely by
  
  any subsequent proof that the person in respect of whom the order has been made
  
  is not a juvenile or the child, and the age recorded by the competent authority
  
  to be the age of person so brought before it, shall for the purpose of this
  
  Act, be deemed to be the true age of that person.