# Commission Implementing Regulation (EU) 2017/373 of 1 March 2017 laying down common requirements for providers of air traffic management/air navigation services and other air traffic management network functions and their oversight, repealing Regulation (EC) No 482/2008, Implementing Regulations (EU) No 1034/2011, (EU) No 1035/2011 and (EU) 2016/1377 and amending Regulation (EU) No 677/2011 (Text with EEA relevance), Division: ATM/ANS.OR.C.005 Safety support assessment and assurance of changes to the functional system

Extent: E+W+S+N.I.

(a)For any change notified in accordance with point ATM/ANS.OR.A.045(a)(1), the service provider other than the air traffic services provider shall:
(1)ensure that a safety support assessment is carried out covering the scope of the change which is:
(i)the equipment, procedural and human elements being changed;
(ii)interfaces and interactions between the elements being changed and the remainder of the functional system;
(iii)interfaces and interactions between the elements being changed and the context in which it is intended to operate;
(iv)the life cycle of the change from definition to operations including transition into service;
(v)planned degraded modes;
(2)provide assurance, with sufficient confidence, via a complete, documented and valid argument that the service will behave and will continue to behave only as specified in the specified context.
(b)A service provider other than an air traffic services provider shall ensure that the safety support assessment referred to in point (a) comprises:
(1)verification that:
(i)the assessment corresponds to the scope of the change as defined in point (a)(1);
(ii)the service behaves only as specified in the specified context;
(iii)the way the service behaves complies with and does not contradict any applicable requirements of this Regulation placed on the services provided by the changed functional system; and
(2)specification of the monitoring criteria necessary to demonstrate that the service delivered by the changed functional system will continue to behave only as specified in the specified context.

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Source: https://www.legislation.gov.uk/eur/2017/373/annex/III/division/COMMON/division/3/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-373/annex-III/division-COMMON/division-3/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.