Doc 4444-RAC/501
PROCEDURES
FOR
AIR NAVIGATION SERVICES

RULES OF THE AIR
AND
AIR TRAFFIC SERVICES

THIRTEENTH EDITION — 1996
This edition incorporates all amendments approved by the Council prior to 12 March 1996 and supersedes, on 7 November 1996, all previous editions of Doc 4444-RAC/501.
INTERNATIONAL CIVIL AVIATION ORGANIZATION

AMENDMENTS
The issue of amendments is announced regularly in the ICAO Journal and in the monthly Supplement to the Catalogue of ICAO Publications and Audio-visual Training Aids, which holders of this publication should consult. The space below is provided to keep a record of such amendments.
RECORD OF AMENDMENTS AND CORRIGENDA
AMENDMENTS 
No.  Date applicable  Date entered  Entered by 
1  6/11/97  17/9/97  ICAO 
2  5/11/98  18/11/98  ICAO 
3  4/11/99  10/9/99
CORRIGENDA 
No.  Date of issue  Date entered  Entered by 

7/11/96 (ii)

TABLE OF CONTENTS

Page  Page
FOREWORD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (vii) Verticalseparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
2.  Verticalseparationapplication . . . . . . . . . . . . . . . . . . 3-1
3.  Verticalseparationminimum . . . . . . . . . . . . . . . . . . . 3-1

PARTI. DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
4.  Minimum cruisinglevel. . . . . . . . . . . . . . . . . . . . . . . . 3-2
5.  Assignmentofcruisinglevels. . . . . . . . . . . . . . . . . . . 3-2
6.  Vertical separation during ascent or descent . . . . . . . 3-2

PARTII. GENERAL PROVISIONS. . . . . . . . . . . . . . . . . 2-1
Horizontalseparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Scope of the Rules of the Air and Air
7.  Lateralseparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 TrafficServicesProcedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

8.  Longitudinal separation . . . . . . . . . . . . . . . . . . . . . . . . 3-4
1.  Relationshiptoother documents. . . . . . . . . . . . . . . . . 2-1
2.  Contents ofthedocument . . . . . . . . . . . . . . . . . . . . . . 2-1 Reductioninseparationminima. . . . . . . . . . . . . . . . . . . . . . . . 3-22

9.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Allocation of responsibility in the provision ofair trafficservices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Airtrafficcontrol clearances . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
3.  Responsibility for the provision of air
10.  Issuance of air traffic control clearances . . . . . . . . . . 3-23 trafficcontrolservice. . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
11.  Contents of air traffic control clearances . . . . . . . . . . 3-24
4.  Responsibility for the provision of flight
12.  Description of air traffic control clearances . . . . . . . . 3-24 information service and alerting service . . . . . . . . . . . 2-2
13.  Clearances to fly maintaining own separation
5.  Division of responsibility for control while in visual meteorological conditions. . . . . . . . . . 3-24 betweenair trafficcontrolunits. . . . . . . . . . . . . . . . . . 2-2
14.  Essentialtrafficinformation . . . . . . . . . . . . . . . . . . . . 3-25
6.  Responsibility in regard to military traffic . . . . . . . . . 2-3
15.  Clearance of a requested change in
7.  Responsibility in regard to unmanned flightplan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25 freeballoons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Emergencyandcommunicationfailure . . . . . . . . . . . . . . . . . . 3-25 General air traffic services operating practices . . . . . . . . . . . . 2-4
　
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