How do I distinguish 2 fixes with the same name? I see two fixes in the CIFP file that have the same name PERSN.




Given 2 fixes that have the same name but are located in different regions (defined by ICAO code) how does airplane/pilot distinguish between those 2 when respecting flight plan? 
According to FAA Procedures for Handling Airspace Matters



  e. AIM [Aeronautical Information Management]  must  not  duplicate  any  radio  fix, waypoint,  marker  beacons or  compass  locators names.


how come that those fixes have the same name?
The answer is embedded within the question:  The pilot is able to distinguish between the two fixes because they are in different regions.