Retaliatory duties imposed on specified US-origin goods; MFN tariff rates preserved for other countries thereafter. Further amends Notification No. 50/2017-Customs to impose retaliatory duties on goods originating in or exported from the United States by inserting new tariff table entries (including a per kilogram duty and ad valorem duties for specified tariff lines), omitting an existing entry, renumbering and inserting a chemical tariff entry with an additional ad valorem charge, substituting the proviso to exclude a listed set of entries from applying to US-origin goods, and omitting the third proviso; effective 16 June 2019.