GM1 ATM/ANS.OR.A.045(f) Changes to a functional system

• ED Decision 2017/001/R found in: ATM/ANS Provision of Services (2017/373) (Feb 2023)

GM1 ATM/ANS.OR.A.045(f) Changes to a functional system ED Decision 2017/001/R LACK OF COORDINATION (a)       If an aviation undertaking decides not to cooperate, the service provider, who has identified dependencies with the aviation undertaking, in accordance with [ATM/ANS.OR.A.045(e)(1)](#_DxCrossRefBm1726554913), needs to consider the impact of having the assumptions and risk mitigations not agreed with that aviation undertaking. It should propose a way forward by doing one or more of the following: (1)       making the assumptions themselves and providing evidence that supports them; (2)       adding additional mitigating measures so that the change remains acceptably safe; (3)       modifying the scope of the change, or even reconsidering and cancelling the change. (b)       The service provider affected by a lack of cooperation with an aviation undertaking may wish to inform its competent authority about those aviation undertakings that are not participating and its form of non-participation, in order to seek the assistance of the competent authority in trying to persuade the aviation undertaking to participate. GM1 ATM/ANS.OR.A.045(f) Changes to a functional system ED Decision 2017/001/R LACK OF COORDINATION (a) If an aviation undertaking decides not to cooperate, the service provider, who has identified dependencies with the aviation undertaking, in accordance with [ATM/ANS.OR.A.045(e)(1)](#_DxCrossRefBm647742061), needs to consider the impact of having the assumptions and risk mitigations not agreed with that aviation undertaking. It should propose a way forward by doing one or more of the following: (1) making the assumptions themselves and providing evidence that supports them; (2) adding additional mitigating measures so that the change remains acceptably safe; (3) modifying the scope of the change, or even reconsidering and cancelling the change. (b) The service provider affected by a lack of cooperation with an aviation undertaking may wish to inform its competent authority about those aviation undertakings that are not participating and its form of non-participation, in order to seek the assistance of the competent authority in trying to persuade the aviation undertaking to participate.