Increase in import duty on textile products raises tariff rates across specified textile tariff chapters. Amendment to the First Schedule to the Customs Tariff Act directs substitution of column (4) duty entries for numerous tariff headings in Section XI covering textile chapters, raising many items to a higher ad valorem rate (with selected headings set at a lower increased rate) by direct substitution of tariff entries, enacted under the government's statutory power to effect immediate tariff changes.