A U.S District Court has issued a preliminary injunction against provisions of Senate Bill 571, which enable corporations to deduct PAC contributions from employees’ paychecks while prohibiting labor unions from doing the same.

The ruling supporting the court’s decision cited freedom of political speech and evenhanded application of law as reasons for the injunction.

This is the second provision of the law to be successfully challenged; earlier in the year, a federal judge halted a different portion of the law prohibiting communication with community residents regarding ballot proposals during the 60 days prior to an election.