Hello to everybody !.
OACI - ICAO Docs, are recommendations. This recommendations should be applied later by means of local regulations, who must be adapted to this recommendations. Of course, if you want to operate an airport, provide an ATM service, or a CNS one ... even If you want to fly a plane as a pilot, you should follow this ICAO recommendations !!. This is, as far as I know, about the legal aspects of the ICAO-OACI recommendations.
ESARR regulations ( Eurocontrol Safety Regulation Requirements ) are issued by the Safety Regulatory Commission ( SRC ) of Eurocontrol. SRC made the development of harmonised regulations and requirements for the European Air traffic Management. For example, it's well known the implementation of the SES (Single European Sky ) Legislative Package, which by means of a Commission Regulation ( Eg: EC 2096 /2005) , and published in the Official Journal of the European Commission, gave this "legal value" for the use of the ESARR regulations across the ECAC states. Of course, if you want to be considered "within the SES area" this regulations must be transposed into your local regulations, and published too in the State Official Journal.
The objectives are, more or less, the same. To adopt as much as safety regulations as possible to reach a common minimum level around ECAC States... and around all the world ( Or the states who signed the International Convention of Civil Aviation ).
So, back to your post, in which of the six ESARR's are you interested ?
Regards
PS Useful link Nav. Thanks !