A federal judge in San Francisco will hear arguments on February 14 on a free speech challenge to the new donor disclosure rules enacted by city voters in November.

U.S. District Judge Charles Breyer will consider the Yes on B campaign committee’s request for a preliminary injunction blocking the rules approved by voters as part of Proposition F.

The federal lawsuit was filed on January 28 claiming the rules violate the First Amendment free speech rights because the required disclosures occupy so much space in audio, video, and newspaper advertisements effectively drowning out the political message.

Proposition F, also known as the Sunlight on Dark Money Initiative, requires ads list the contribution amounts as well as the names of the top three donors of $5,000 or more, plus the names and amounts of the top two donors of more than $5,000 to a secondary committee contributing to a primary committee.

The lawsuit also disputes the lowering of the donation threshold to $5,000 from the previous threshold of $10,000 and a requirement donation disclosures be made at the beginning rather than the end of an audio or video message or telephone call.

A San Francisco ballot measure intended to increase the restrictions on political contributions for campaign ads won easily on Tuesday.

Proposition F, the Sunlight on Dark Money measure, passed by 76% of the votes.

The proposition only needed a simple majority to pass.

The measure’s passage means greater disclosure of who is behind campaign advertisements paid for by PACs.

The top three largest donors of the committee paying for the advertisement must now disclose the name and amount contributed to the committee.

Proposition F will take effect 10 days after the election results are certified.