Excise duty amendments increase ad valorem rates and revise goods classification and alloy definitions affecting tariff treatment. Revisions to the First Schedule of the Central Excises Act substitute and insert tariff entries that alter ad valorem duty rates, add a specific molasses item by measure, and replace item descriptions for textiles, wood products and mineral fibres. The amendments prescribe duty on base fabrics plus specified additional percentages or per-area charges, introduce alloy and fibre predominance explanations to govern classification, and insert clarifying explanations and exclusions to determine when goods fall within or are excluded from particular items.