<Tr> <Td_colspan="2"> Heart of Atlanta Motel, Inc. v. United States (1964) Katzenbach v. McClung (1964) Alexander v. Holmes County Board of Education (1969) Griggs v. Duke Power Co. (1971) Ricci v. DeStefano (2009) </Td> </Tr> <P> The Civil Rights Act of 1964 (Pub. L. 88--352, 78 Stat. 241, enacted July 2, 1964) is a landmark civil rights and US labor law in the United States that outlaws discrimination based on race, color, religion, sex or national origin . It prohibits unequal application of voter registration requirements, racial segregation in schools, employment, and public accommodations . </P> <P> Powers given to enforce the act were initially weak, but were supplemented during later years . Congress asserted its authority to legislate under several different parts of the United States Constitution, principally its power to regulate interstate commerce under Article One (section 8), its duty to guarantee all citizens equal protection of the laws under the Fourteenth Amendment and its duty to protect voting rights under the Fifteenth Amendment . </P> <P> The legislation had been proposed by President John F. Kennedy in June 1963, but opposed by filibuster in the Senate . Thereafter, President Lyndon B. Johnson pushed the bill forward, which in its final form was passed in the U.S. Congress by a Senate vote of 73 - 27 and House vote of 289 - 126 (70% - 30%). The Act was signed into law by President Johnson on July 2, 1964, at the White House . </P>

Congress passed the civil rights act of 1964 under its power to