Maryland Public Service Commission intrastate in Maryland must obtain a certificate to operate in Maryland. Carriers operating in Montgomery or Prince George's Counties that will also operate interstate into Washington, DC, or the cities and counties in Virginia that border Washington must also register with the Washington Metropolitan Area Transit Commission. Maryland Public Service Commission The Maryland Public Service Commission (PSC) is an independent administrative agency within the state government which regulates public utilities and certain taxi cab and other passenger services in Maryland. Similar to other state Public Utilities Commissions, the Maryland PSC regulates and sets tariff rates for natural gas, electricity distribution,
Washington County, Maryland age 18 and 9.50% of those age 65 or over. According to the Maryland Department of Business and Economic Development, the following were the major employers in the county (excluding post offices, state government, and local governments, but including public institutions of higher education): Washington County Public Schools administers public schools in the county. See "Washington County Public Schools – School Directory" for a detailed listing of elementary, middle, high, and other schools. Public high schools Private high schools Washington County, Maryland Washington County is located in the western part of the U.S. state of Maryland. As of the 2010