Excise exemption for vegetable saps used in manufacture of traditional-system medicaments now subject to nil duty within producing factory. The amendment adds an exemption entry providing that vegetable saps and extracts used within the factory of their production for manufacture of medicaments exclusively used in the Ayurvedic, Unani or Siddha systems are subject to nil excise duty, by way of modification to Notification No. 4/97-Central Excise.