In February and March of 2013, the Supreme Court heard oral arguments on two cases regarding voting laws. The first was Shelby County v. Holder regarding the constitutionality of Section 5 of the Voting Rights Act, which requires the Department of Justice to approve any change in voting laws of states that were found to have discriminatory voting practices in the past. The second case, Arizona v. Inter Tribal Council of Arizona, considers the constitutionality of an Arizona law (Proposition 200), which required proof of citizenship in order to register to vote. Proposition 200 was struck down by the U. S. Court of Appeals for the Ninth Circuit on the grounds that it was inconsistent with the National Voter Registration Act of 1993.