Excise duty rationalization preserves specified effective rates for listed tariff items, exempting duty above those rates. Prescribes effective basic excise duty rates for specified tariff sub headings by exempting, for listed goods, that portion of excise duty which exceeds the effective ad valorem or nil rate specified in the accompanying Table; the Table predominantly applies a 10% ad valorem effective rate to identified headings, with specified alternative ad valorem treatments for certain items.