Customs tariff amendments refine classifications and impose revised duty treatments for specialized, defence and technology-related imports. The Schedule amends the Customs Tariff by substituting, inserting and omitting tariff items across multiple chapters to create more granular classifications, specify unit-based duty rates, and add Supplementary Notes that define critical terms such as Blended Aviation turbine fuel, Natural Menthol and Special Finishes; it also separately classifies defence, protection and technology-related goods with prescribed duty treatments.