Outlawed discriminatory voting practices that had been responsible for the widespread disenfranchisement of African Americans in the United States. Echoing the language of the 15th Amendment, the Act prohibited states from imposing any "voting qualification or prerequisite to voting, or standard, practice, or procedure ... to deny or abridge the right of any citizen of the United States to vote on account of race or color." specifically no literacy tests. signed into law by LBJ.