---
title: "ATS.TR.225 Responsibility for control — SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES, ATM/ANS · Avioverse"
description: "A controlled flight shall be under the control of only one air traffic control unit at any given time."
url: "https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b/ats-tr-225"
---

# ATS.TR.225 Responsibility for control

SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES · Regulation (EU) 2017/373 · EAR revision 12 Mar 2025

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-traffic-managementair-navigation-services-provision-services) · [EUR-Lex 2017/373 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32017R0373)

IR Implementing rule

## ATS.TR.225 Responsibility for control

(a) A controlled flight shall be under the control of only one air traffic control unit at any given time.

(b) Responsibility for the control of all aircraft operating within a given block of airspace shall be vested in a single air traffic control unit. However, control of an aircraft or groups of aircraft may be delegated to other air traffic control units provided that coordination between all air traffic control units concerned is assured.

IR · ATS.TR.225 — Regulation (EU) 2017/373 · Commission Implementing Regulation (EU) 2020/469 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

[All rules in SUBPART B — TECHNICAL REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES (ATS.TR)](https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, 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.