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Specific information on classifications can be searched in several ways, using the official text of the classification, the alphabetical indexes or specific comments and decisions made on these classifications. Specific information is available for each search method.
Search the alphabetical index
Classification:
Search by code or keywords
Search the classifications text
Classification:
Search by code or keywords
Search for specific registry entries
Search by Registry ID
or by classification:and code
Include subcategories in search?Yes  No
or keywords
or most recently updated
Search the correspondence tables
Correspondence:
Search by code
Include subcategories in search?Yes  No