Parts of a campaign finance law approved by Missouri voters in November have been ruled unconstitutional.

U.S. District Court Senior Judge Ortrie Smith issued a ruling Friday finding corporations and labor organizations must be permitted to make contributions to campaign committees only supporting or opposing ballot measures, and political action committees must be able to receive contributions from other political action committees.

The court also ruled the ban on contributions to PACs by heavily regulated entities unconstitutional.

Finally, the ruling permanently enjoins the Missouri Ethics Commission from interpreting certain campaign finance provisions in any manner inconsistent with previously issued advisory opinions. Contribution limits will continue to apply only to contributions to candidates unless a contribution to a continuing committee or PAC is restricted or designated for a specific candidate.

The court stayed any injunctive relief ordered for 45 days to allow the state to review the ruling and to allow for an opportunity to appeal.