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,
Comptroller of the Treasury of Maryland v. Wynne collected by the state's comptroller of the treasury. Residents who earn income outside of Maryland may receive a credit against the state, but not the county income tax for income taxes paid on that income to other states. Nonresidents who earn income in Maryland must pay the state income tax and, in lieu of the county income tax, a "special nonresident tax" that was set at a rate "equal to the lowest county income tax rate set by any Maryland county." In 2006, Maryland residents Brian and Karen Wynne, a married couple, earned income from other states through an S