The present document intends to investigate the improvements needed in the VHF Data Link Mode 2 European Norms (ETSI EN 303 214 [i.7]@ ETSI EN 301 841 parts 1 [i.4] to 3 [i.6]) in order to determine real-world compliance to relevant regulations@ and if there is a need to align them with the relevant ELSA reports [i.12]@ [i.13]@ [i.14]@ [i.15] findings and further inputs from PATH1@ PATH2 and other SDM/EASA mandates (e.g. CEF2017/IP1)@ as well as the relevant regulation. The present document considers also some specific aspects addressing ATN Baseline 1 and Baseline 2 compatibility.