A federal judge on Tuesday denied a petition by a handful of voting and civil rights groups to block Georgia and three other states from requiring new voters demonstrate citizenship.

The Georgia NAACP and the League of Women Voters had sought an injunction to prevent the four states—Alabama, Arizona, Georgia, and Kansas—from using new voter registration forms that require proof of citizenship. The policy had been previously approved by federal officials at the U.S. Election Assistance Commission, an independent agency created in 2002.

U.S. District Court Judge Richard Leon denied the group’s requests for a temporary restraining order and preliminary injunction, writing that the plaintiffs had failed to demonstrate the new policy would cause “irreparable harm.”

“Given that the registration deadlines for the Alabama and Georgia primaries and for the Kansas Republican Caucus had already passed at the time this TRO motion was filed … and that the effects of [the federal] actions on the ongoing registration process for the Kansas Democratic Caucus and the plaintiffs’ rights and efforts thereto are uncertain at best, plaintiffs have not demonstrated they will suffer irreparable harm before the hearing on their Motion for a Preliminary Injunction,” Leon wrote in a Tuesday order.

The judge set that hearing for March 9, a week after Georgia voters will head to the polls in the state’s presidential primary.