---
title: "AIS.OR.250 Consistency requirement — SPECIFIC REQUIREMENTS FOR THE PROVIDERS OF AERONAUTICAL INFORMATION SERVICES, ATM/ANS · Avioverse"
description: "Where aeronautical data or aeronautical information is duplicated in the AIP of more than one Member State, the AIS providers responsible for those AIPs…"
url: "https://avioverse.aero/regulations/easa/atm-ans/specific-requirements-for-the-providers-of/subpart-a/ais-or-250"
---

# AIS.OR.250 Consistency requirement

SPECIFIC REQUIREMENTS FOR THE PROVIDERS OF AERONAUTICAL INFORMATION SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

IR Implementing rule

## AIS.OR.250 Consistency requirement

Where aeronautical data or aeronautical information is duplicated in the AIP of more than one Member State, the AIS providers responsible for those AIPs shall establish mechanisms to ensure consistency between the duplicated information.

IR · AIS.OR.250 — Regulation (EU) 2017/373 · Commission Implementing Regulation (EU) 2020/469 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMC Acceptable means of compliance

## AMC1 AIS.OR.250 Consistency requirement

DUPLICATED INFORMATION

The AIS provider should ensure that:

(a) coordination and explicit agreement are established with the AIS providers responsible for the aeronautical information publications (AIPs) of the States concerned before introducing changes in published border or cross-border data and information; and

(b) periodic reviews are performed to detect inconsistencies between the AIPs of the States concerned.

AMC · AMC1 AIS.OR.250 — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GM Guidance material

## GM1 AIS.OR.250 Consistency requirement

DUPLICATED INFORMATION

(a) Coordination and alignment processes between AIS providers should whenever possible be expanded beyond the AIP content and include all duplicated aeronautical data and information.

(b) The AIS provider may identify and maintain a list of the data items and information which should be subject to coordination, for reference and use by its operational staff.

(c) When establishing periodic reviews, the AIS provider may reflect those in formal arrangements established with other AIS providers.

GM · GM1 AIS.OR.250 — Regulation (EU) 2017/373 · ED Decision 2020/008/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

[All rules in SUBPART A – ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF AERONAUTICAL INFORMATION SERVICES (AIS.OR)](https://avioverse.aero/regulations/easa/atm-ans/specific-requirements-for-the-providers-of/subpart-a)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.