It was meant to prevent discrimination against African American voters, but Wednesday the U.S Supreme court heard arguments on whether or not to keep section five of the Voting Rights At of 1965.
The section has been renewed four times by Congress. In fact, President George W. Bush extended the law for 25 years in 2006. But that isn't enough to keep it out of legal danger.
Protesters in Washington D.C. rallied to keep the law as the Supreme Court heard arguments Wednesday from an attorney representing Shelby County, Alabama, the party who wants the law removed.
The law affects nine states mostly in the South. In those states local election boards must get permission or "pre-clearance" from the federal government before changing any voting procedures small or large.
The law was established to protect black voters from voter discrimination and intimidation.
But some argue the states targeted under the law have reached racial progress and are now in line with other parts of the country.
Nonetheless, supporters say it should stay in tact.
The Supreme Court is expected to make a decision this Spring.