.AC represents the official domain extension or the internet country code top-level domain (ccTLD) of Ascension Island. This ccTLD was introduced in 1997 and was intended for entities affiliated with Ascension Island, Tristan da Cunha, and Saint Helena. Ascension Island Network Information Centre is the authorized body for carrying out its registry and general administration.
There is no special process needed to register a .AC domain name, no special action is needed on your end.
Entities connected with Saint Helena, Ascension and Tristan da Cunha