Corrigendum No. I. far English text only Llll71 INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES AIR TRAFFIC SERVICES ANNEX 11 TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATIOU SIXTH EDITION - SEPTEMBER 1970 CORRIGENDUM No. 1 for English text only 1. Page 16, paragraph 3.3.4, sub-paragraph 3 , line 6 Amend the line to read .--- "but not less than half of, those used for each" 2. Record this Corrigendum on the Record Sheet, page 2.