ATS.OR.315, the article that requires a fatigue policy, not a feature

The article, verbatim

In accordance with point ATS.OR.200 (Safety Management System), an air traffic control service provider shall:

(a) develop and maintain a policy for the management of air traffic controllers' fatigue;

(b) provide air traffic controllers with information programmes on the prevention of fatigue, complementing human factors training provided in accordance with Sections 3 and 4 of Subpart D of Annex I to Regulation (EU) 2015/340.

AMC1 ATS.OR.315(a), Fatigue Management Policy, verbatim

(a) The air traffic controllers' fatigue management policy should:

1. declare the commitment to proactively and systematically monitor and manage fatigue and describe the expected benefits for the safety of operations;
2. be signed by the accountable manager;
3. address the mitigation of the operational impact of air traffic controllers' fatigue;
4. be communicated, with visible endorsement, throughout the air traffic control service provider;
5. include a commitment to:
   1. consider the best practices;
   2. provide appropriate resources; and
   3. enforce fatigue management as a responsibility of managers, staff involved in fatigue management procedures and air traffic controllers;
6. be periodically reviewed to ensure it remains relevant and appropriate.

(b) In accordance with the policy in point (a), the air traffic control service provider should establish and implement:

1. principles and procedures to enable fatigue reporting;
2. principles and procedures for occurrence investigation and analysis to consider fatigue as contributing factor;
3. procedures for the identification and management of the effect of fatigue on the safety of operations.