Customs tariff amendments update exemptions and duty classifications, substituting multiple tariff entries linked to a consolidated notification. Amendments substitute, omit and insert tariff table entries across specified customs exemption notifications to redefine exemptible goods by reference to tariff headings and serial numbers in TABLE I-IV of a consolidated notification, impose substituted basic customs duty percentages for particular tariff items where exemptions do not apply, and remove certain serial and annexure entries; the changes operate under statutory powers and include an operative commencement date.