---
title: "GM23 Annex I Definitions — ANNEX I – Definitions, Air OPS · Avioverse"
description: "RUNWAY SURFACE CONDITION(S) (a) The runway surface conditions used in the RCR establish a common language between the aerodrome operator, the aeroplane…"
url: "https://avioverse.aero/regulations/easa/air-ops/definitions/powers-and-recitals/gm23-annex-i-definitions"
---

# GM23 Annex I Definitions

ANNEX I – Definitions · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-air-operations) · [EUR-Lex 2012/965 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32012R0965)

GM Guidance material

## GM23 Annex I Definitions

RUNWAY SURFACE CONDITION(S)

(a) The runway surface conditions used in the RCR establish a common language between the aerodrome operator, the [aeroplane](https://avioverse.aero/glossary/easa/aeroplane) manufacturer and the aeroplane operator.

(b) [Aircraft](https://avioverse.aero/glossary/easa/aircraft) de-icing chemicals and other contaminants are also reported but are not included in the list of runway surface condition descriptors because their effect on the runway surface friction characteristics and the RWYCC cannot be evaluated in a standardised manner.

GM — Regulation (EU) No 965/2012 · ED Decision 2021/005/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in Powers and recitals](https://avioverse.aero/regulations/easa/air-ops/definitions/powers-and-recitals)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.