Corrigendum No. 2 to English text 15/6/72 INTERNATIONAL STANDARDS AND JIECOMMENDED PRACTICES AIR TRAFFIC SERVICES ANNEX 11 TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATION SIXTH EDITION - SEPTEMBER 1970 CORRIGENDUM No. 2 to English text only 1. Page 17, paragraph 3.5.1.1, 2nd and 3rd lines, the phrase "air traffic unit" should read "air traffic control unit". 2. Record this Corrigendum on the record sheet, page 2.