Reduction in oil import duty: specified petroleum goods now attract reduced basic customs duty under amended notification. Amendment to Notification No. 21/2002-Customs revises the table of exemptions and effective duty rates for petroleum goods: it omits several serial entries, substitutes revised duty entries for certain serial numbers, and inserts a new entry 77B covering tariff headings 2710-2715 imposing a reduced basic duty on all goods except those specifically listed elsewhere, thereby altering the schedule of exemptions and effective duty incidence under section 25(1) of the Customs Act, 1962.