law: Custom Act, 1962 
  16.
  
  Date for Determination of Rate of Duty and Tariff Valuation of Export Goods. – 
  (1)
  
  The rate of duty and tariff valuation, if any, applicable to any export goods,
  
  shall be the rate and valuation in force, - 
  (a) in the case of goods entered for export under section 50, on the
  
  date on, which the proper officer makes an order permitting clearance and
  
  loading of the goods for exportation under section 51;
  (b) in the case of any other goods, on the date of payment of duty.
  (2)
  
  The provisions of this section shall not apply to baggage and goods exported by
  
  post.