law: Beedi and Cigar Workers (Conditions of Employment) Act, 1966
  
  30.Onus as to age.-
  (1) When any act or omission would, if a
  
  person were under a certain age, be an offence punishable under this Act and
  
  such person is, in the opinion of the court, prima facie under such age, the
  
  burden shall be on the accused to prove that such person is not under such age.
  (2) A declaration in writing by a medical officer not below the rank of a Civil
  
  Assistant Surgeon relating to an employee that he has personally examined him
  
  and believes him to be under the age stated in such declaration, shall, for the
  
  purposes of this Act and the rules made thereunder ,
  
  be admissible as evidence of the age of that employee.