Northwest Austin Municipal Utility District No. 1 (NAMUDNO) v. Holder, a U.S. Supreme Court case in which a small utility district in Texas is challenging Section 5 of the Voting Rights Act of 1965, is scheduled for oral argument on April 29. Section 5, reauthorized in 2006, applies to all or part of 16 states, and it applies to nine states in their entirety. It requires those states to get federal approval before changing election rules or procedures, due to past laws and practices that discriminated against and disenfranchised racial minorities. This provision is referred to as the "preclearance" provision.