"This document [...] provides information on how the Federal Aviation Administration (FAA), as the U.S. meteorological authority with regard to the International Civil Aviation Organization (ICAO), meets its obligations to the International Airways Volcano Watch (IAVW), which is sponsored by ICAO. Information on points of contact and useful Web sites are provided in this document. However, readers of this document are encouraged to visit the current Web sites to obtain the most current information on accessing information. Even though this document establishes the framework for operations, each agency has the responsibility to document its internal procedures for implementation of this plan."
Office of the Federal Coordinator for Meteorology: http://www.ofcm.gov/