DES MOINES, Iowa (AP) -

A judge has temporarily halted activity in a lawsuit filed against Iowa Secretary of State Matt Schultz over a new voting rule he proposes to enact.

Judge Mary Pat Gunderson says in her ruling that proceedings in the lawsuit filed by the American Civil Liberties Union should be stopped until the rule is adopted or rescinded.

Her decision filed Thursday says the court will not use limited resources addressing a rule that could be substantially different in its final approval.

Attorneys for Schultz and the ACLU agreed to the stay until the rule goes into effect, which is likely around March 13.

The rule establishes a way to remove voters from registration rolls if they cannot prove citizenship. The ACLU and other civil rights groups say it intimidates minority voters.