Definition of laboratory chemicals clarified: imports for exclusive laboratory use in small retail packings excluded from trading classification. Amendment replaces Chapter 98 note 3 to define laboratory chemicals for Heading 9802 as chemicals, organic or inorganic, imported and intended solely for the importer's own use rather than for trading or resale, presented in packings of small retail size and identifiable by purity, markings or other features showing they are meant exclusively for laboratory use; amendment is made under section 11A powers and takes effect on publication in the Official Gazette.