 While naturally, an "atoll" refers to a ring of islands, an "atoll" in the administrative sense, refers to a group of "island" class constituencies, not necessarily within the requirements of a natural atoll.While the majority of administrative atolls are indeed natural atolls, there are exceptions.Each administrative atoll has an "atoll council" which monitors the work of the "island councils" in the atoll, and keep communications with the central government.