Tariff classification changes: substitute column entries and units across listed tariff headings, and omit a specified tariff item. Amendments to the First Schedule of the Customs Tariff Act replace and omit specified tariff entries: one tariff item is omitted and, across multiple chapters and listed tariff subheadings, entries in column (3) are substituted with the unit designators kg., u or m as specified; additionally, certain tariff items in Chapter 85 have their column (4) entries substituted with a prescribed duty entry. These substitutions and the omission effect reclassification and measurement-unit alignment within the tariff schedule.