Ad valorem rate adjustment for raw rubber imports increases tariff exemption, amending the existing customs notification and import relief. The Central Government amends Notification No. 82/86 Customs by substituting the previously specified 40% ad valorem with 45% ad valorem, thereby raising the ad valorem exemption rate applicable to raw and synthetic rubber under Chapter 40, pursuant to section 25(1) of the Customs Act, 1962, in the public interest.