(arranged in reverse chronological order of changes made)

Date of change Changes
1 November 2013 The chapter on “Letters and numerals” has been revised to present the Registry’s examination practice in the new section on “Descriptive words paired with corresponding abbreviations/ acronyms”.
1 January 2013 The chapter on “Classification” has been revised due to the use of the 2013 version of the tenth edition of the International Classification with effect from 1.1.2013.