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Operationally significant changes to the AIP shall be published in accordance with
  • A
    AIP supplements and shall be clearly identified.
  • B
    AIRAC procedures and identified by the acronym AIRAC.
  • C
    AIC procedures and identified by the acronym AIC followed by a number.
  • D
    NOTAM procedures and identified by acronym NOTAM followed by a number.

ICAO Annex 15

AIRAC. An acronym (aeronautical information regulation and control) signifying a system aimed at advance notification, based on common effective dates, of circumstances that necessitate significant changes in operating practices.

CHAPTER 4. AERONAUTICAL INFORMATION PUBLICATIONS (AIP)

4.2.8 Operationally significant changes to the AIP shall be published in accordance with Aeronautical Information Regulation and Control (AIRAC) procedures and shall be clearly identified by the acronym — AIRAC.

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