Customs and excise duty revisions: tariff and procedural amendments impose altered rates, exemptions and compliance measures effective immediately. Immediate fiscal and regulatory adjustments under the Finance Bill, 2015 take effect largely by declaration under the Provisional Collection of Taxes Act, 1931, revising customs and central excise tariff and non tariff entries, altering selected duty rates, and modifying exemptions and concessional treatment subject to actual user conditions or certification. Central excise reforms remove education cesses on excisable goods while increasing the standard ad valorem CENVAT rate; specific measures rework valuation, compounded levy mechanics tied to packing machine speed, targeted duty changes for petroleum, tobacco and select industrial inputs, and procedural amendments to CENVAT Credit and dispatch rules are introduced.