Repetitive Flight Plans (RPL)
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A repetitive flight plan (RPL) is a flight plan related to a series of frequently recurring, regularly operated individual flights with identical basic features, submitted by an operator for retention and repetitive use by ATS units. (ICAO Annex 2: Rules of the Air)
RPLs are routinely used by most airlines for regular scheduled flights which operate over the same route at least once a week.
ICAO Annex 11 Chapter 3