A new law in New Hampshire will require anyone registering to vote for the first time in the Granite State to provide documentation they are U.S. citizens, like a birth certificate or passport.

A new lawsuit from the New Hampshire Youth Movement, filed in federal court on Tuesday, alleges that the law violates the U.S. Constitution by making it “substantially harder — and in some cases impossible — for many New Hampshire citizens to register and vote.” They're asking the court to permanently block the law from taking effect.

The new law requires all voters to present documentary proof of citizenship to register and a photo ID to vote. The legal challenge by the New Hampshire Youth Movement seeks to permanently block it from going into effect.