A gun rights group is suing a California city after it passed an ordinance mandating gun owners to purchase liability insurance and pay an annual fee.

The National Association for Gun Rights and an individual plaintiff announced the lawsuit on Wednesday morning, a day after the city council in San Jose voted on the first-of-its-kind ordinance. The plaintiffs allege that the new provision is unconstitutional because it applies an undue financial burden for those wishing to express their Second Amendment rights. The lawsuit was filed in the U.S. District Court for the Northern District of California.