Customs amendment revises tariff classifications and adds ad valorem duties on specified edible oils, altering import duty treatment. Amendment under the statutory power in section 25 revises an earlier notification by substituting certain tariff items and inserting two new table entries specifying that edible oils under designated headings and sub headings are to be assessed to customs duty under the First Schedule to the Customs Tariff Act, 1975 at specified ad valorem rates, thereby altering their import duty treatment.