Excise duty amendments update tariff classifications and grant targeted exemptions for specific oils, alcohol, butene and KVIC footwear. Amendments implement consequential changes to multiple earlier Central Excise notifications by omitting, substituting and inserting table entries to alter tariff headings, product descriptions and duty rates; they prescribe an effective rate for pan masala and establish targeted excise exemptions for processed rape seed/mustard oil, ethyl alcohol, butene used in manufacture of methyl ethyl ketone, and specified low value footwear produced by KVIC units.