The National Voter Registration Act of 1993 (NVRA), also known as the Motor Voter Act, is a United States federal law signed into law by President Bill Clinton on May 20, 1993, that came into effect on January 1, 1995. The law was enacted under the Elections Clause of the United States Constitution and advances voting rights in the United States by requiring state governments to offer simplified voter registration processes for any eligible person who applies for or renews a driver's license or applies for public assistance, and requiring the United States Postal Service to mail election materials of a state as if the state is a nonprofit. The law requires states to register applicants that use a federal voter registration form, and prohibits states from removing registered voters from the voter rolls unless certain criteria are met. The act exempts from its requirements states that have continuously since August 1, 1994, not required voter registration for federal elections or offered election day registration (EDR) for federal general elections. Six states qualify for the exemption: North Dakota, which does not require registration, while Idaho, Minnesota, New Hampshire, Wisconsin and Wyoming because of the EDR exemption. Maine lost the exemption when it abolished EDR in 2011, although EDR was subsequently restored in that state. Background After Congress enacted the Voting Rights Act of 1965 to address rampant voting discrimination against racial minorities, voting rights advocates argued for federal legislation to remove other barriers to voter registration in the United States. In the early 1970s, Congress considered several proposals to require the U.S. Census Bureau to mail voter registration forms to every household, none of which passed. In the mid and late 1970s, proposals to require certain public agency offices to make voter registration forms available and to require states to allow Election Day voter registration failed. Congress passed two pieces of legislation in the 1980s that made voter registration for federal elections more accessible for certain disadvantaged populations. The Voting Accessibility for the Elderly and Handicapped Act of 1984 requires states to make available to elderly and disabled voters "a reasonable number of accessible permanent registration facilities" and registration aids. The Uniformed and Overseas Citizens Absentee Voting Act of 1986 requires states to mail federal voter registration forms to overseas and military voters and permit them to register by mail. In the light of low voter turnout in federal elections