Export duty amendment revises a customs notification: specified tariff lines exempted and chromium ores added as exempt. The government amends Notification No.27/2011-Customs to revise Table entries: specified tariff lines under 2601 11 are substituted to record those goods as duty exempt; the duty column entries for two existing serials are replaced to reflect a substituted preferential rate; and a new entry for tariff heading 2610 inserts chromium ores and concentrates as duty exempt, thereby modifying the schedule of exemptions and rates in the principal notification.