As of 10 November 2016, certain separation minima shall be applied only to those pairs of aircraft meeting required communication performance (RCP) and a required surveillance performance (RSP) specifications in accordance with provisions in:
Annex 6 — Operation of Aircraft;
Annex 11 — Air Traffic Services;
Procedures for Air Navigation Services — Air Traffic Management (PANS-ATM, Doc 4444);
Regional Supplementary Procedures (Doc 7030).
In particular, Amendment 7 to the PANS-ATM (Doc 4444) made changes to the 30NM lateral and 30NM/50NM longitudinal separation standards and introduced a new time-based longitudinal separation as described in in Figure below.
The Asia and the Pacific (APAC) and North Atlantic (NAT) Regions, which had applied 30NM lateral and 30/50 NM longitudinal separation minimum, agreed to transition to the implementation of these new requirements from 29 March 2018 in part of their airspace. For more information, click here - APAC and NAT.