Authorities 2 : The Presidential and legislative powers transferred to federal agencies through laws, Executive Orders, and Presidential Decision Directives
U.S. Environmental Protection Agency, Radiation Glossary, Office of Radiation and Indoor Air Radiation Protection Division, Washington, DC, USA 2013. http://www.epa.gov/radiation/glossary/index.html#a , (Dzstr/ Rad Emr - Amer) {823}