---
title: "GM1 SECTION VI — SPECIFIC REQUIREMENTS FOR PROVIDERS OF FLIGHT PROCEDURE DESIGN SERVICES, ATM/ANS · Avioverse"
description: "PROHIBITED, RESTRICTED AND DANGER AREAS (a) When a prohibited, restricted or danger area is established, the area should be as small as practicable and…"
url: "https://avioverse.aero/regulations/easa/atm-ans/specific-requirements-for-providers-of-flight/appendix-1/gm1-section-vi"
---

# GM1 SECTION VI

SPECIFIC REQUIREMENTS FOR PROVIDERS OF FLIGHT PROCEDURE DESIGN SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

GM Guidance material

## GM1 SECTION VI

PROHIBITED, RESTRICTED AND DANGER AREAS

(a) When a prohibited, restricted or danger area is established, the area should be as small as practicable and be contained within simple geometrical limits, so as to permit ease of reference by all concerned.

(b) Nationality letters are those contained in ICAO Doc 7910 ‘Location Indicators’.

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

[All rules in Appendix 1 — REQUIREMENTS FOR AIRSPACE STRUCTURES AND FLIGHT PROCEDURES CONTAINED THEREIN](https://avioverse.aero/regulations/easa/atm-ans/specific-requirements-for-providers-of-flight/appendix-1)

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.