---
title: "ATS.OR.320 Air traffic controllers' rostering system(s) — SPECIFIC REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES, ATM/ANS · Avioverse"
description: "An air traffic control service provider shall develop, implement and monitor a rostering system in order to manage the risks of occupational fatigue of…"
url: "https://avioverse.aero/regulations/easa/atm-ans/part-ats/subpart-a/ats-or-320"
---

# ATS.OR.320 Air traffic controllers' rostering system(s)

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

IR Implementing rule

## ATS.OR.320 Air traffic controllers' rostering system(s)

(a) An air traffic control service provider shall develop, implement and monitor a rostering system in order to manage the risks of occupational fatigue of air traffic controllers through a safe alternation of duty and rest periods. Within the rostering system, the air traffic control service provider shall specify the following elements:

(1) maximum consecutive working days with duty;

(2) maximum hours per duty period;

(3) maximum time providing air traffic control service without breaks;

(4) the ratio of duty periods to breaks when providing air traffic control service;

(5) minimum rest periods;

(6) maximum consecutive duty periods encroaching the night time, if applicable, depending upon the operating hours of the air traffic control unit concerned;

(7) minimum rest period after a duty period encroaching the night time;

(8) minimum number of rest periods within a roster cycle.

(b) An air traffic control services provider shall consult those air traffic controllers who will be subject to the rostering system, or, as applicable, their representatives, during its development and its application, to identify and mitigate risks concerning fatigue which could be due to the rostering system itself.

IR · ATS.OR.320 — Regulation (EU) 2017/373 · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GM Guidance material

## GM1 ATS.OR.320(a) Air traffic controllers’ rostering system(s)

STRUCTURE AND VALUES OF THE ROSTERING SYSTEM

The selection and the regular revision of an appropriate structure and of appropriate values of the rostering system, in accordance with ATS.OR.320(a) and which fit the intended operations, should be based upon:

(1) scientific principles;

(2) data gathered by the air traffic control service provider; and

(3) best practices.

GM · GM1 ATS.OR.320(a) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

AMC Acceptable means of compliance

## AMC1 ATS.OR.320(a)(6);(7) Air traffic controllers’ rostering system(s)

NIGHT TIME

Night time should be considered as the time between midnight and 05.59.

AMC · AMC1 ATS.OR.320(a)(6) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

GM Guidance material

## GM1 ATS.OR.320(b) Air traffic controllers’ rostering system(s)

AIR TRAFFIC CONTROLLERS’ INVOLVEMENT

Additional guidance concerning the involvement of air traffic controllers in the definition of rostering systems is available in EUROCONTROL Study on Shiftwork practices — ATM and related Industries, edition 1.0 of 14 April 2006.

GM · GM1 ATS.OR.320(b) — Regulation (EU) 2017/373 · ED Decision 2017/001/R · ATM/ANS Easy Access Rules · EAR revision 12 Mar 2025

[All rules in SUBPART A — ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF AIR TRAFFIC SERVICES (ATS.OR)](https://avioverse.aero/regulations/easa/atm-ans/part-ats/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.