Excise duty amendments: redefine motor vehicle chassis and body-building duties, extend concessional rates and exempt specified films. Amendments reframe excise treatment by prescribing effective duties for vehicle chassis and bus body building, exempting truck body building with exceptions, extending concessional duty for light commercial vehicles, increasing the value threshold for soap to attract a concessional rate, exempting feature films within specified parameters, and prescribing ad valorem excise rates for water-based paints and insulating varnishes distinct from plastic/oil-based paints.