ICAO Doc 9613
1.1.4 Scope of performance-based navigation
184.108.40.206 Lateral performance
For oceanic/remote, en-route and terminal phases of flight, PBN is limited to operations with linear lateral performance requirements and time constraints due to legacy reasons associated with the previous RNP concept.
In the approach phases of flight, PBN accommodates both linear and angular laterally guided operations. The guidance to fly the ILS/MLS/GLS procedure is not provided by the RNP system, consequently ILS/MLS/GLS precision approach and landing operations are not included in this Manual .
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