AIS is build up by different organisations with different responsibilities.
IMO [1]
ITU [2]
EU [3]
IALA [4]
IEC [5]
Links[1] http://www.e-navigation.nl/content/imo-documents [2] http://www.e-navigation.nl/content/itu-documents [3] http://www.e-navigation.nl/content/eu-documents [4] http://www.e-navigation.nl/content/iala-documents [5] http://www.e-navigation.nl/content/iec-documents