The present document is applicable to the ground implementation of data link services, derived from the ICAO standard Context Management (CM) and Controller Pilot Data Link Communication (CPDLC) applications, including test procedures. Any software elements related to the software assurance level of data link ground implementation are outside of the scope of the present document. As such the essential requirements of the Interoperability Regulation are not considered for software elements within the present document. The present document does not give presumption of conformity to any of the requirements stemming from the Regulation (EC) 216/2008 [i.9] as amended by Regulation (EC) 1108/2009 [i.10]. The present document does not give presumption of conformity related to the maintenance requirements, environmental constraints, effect of harmful interference and civil/military coordination. NOTE: For these ERs, please refer to the Air Navigation Service Provider procedures. Requirements in the present document which refer to "should" statements or recommendations in the normatively referenced material (clause 2.1) are to be interpreted as fully normative ("shall") for the purpose of compliance with the present document.