LOS ANGELES (CBSLA.com) — Digital billboards within the city of Los Angeles could be going dark, at least temporarily.

Los Angeles City Attorney Carmen Trutanich called on billboard companies CBS and Clear Channel Outdoor to shut off 108 digital signs, citing a court order that determined the permits for them were given out illegally under a 2006 settlement.

He says the companies’ appeals are exhausted and now they need guidance from the court.

“We are asking the court for a clear pathway, for guidance on how to facilitate what the appellate court has stated. We believe that order needs to be much more thorough in terms of what the court seeks from the city of Los Angeles,” he during a news conference in West Los Angeles Thursday.

Trutanich said attempts by the companies to appeal the now four-year-old court order were rejected by the California Supreme Court last month.

He wants all interested parties to come together and agree on a transparent process that treats all interests fairly and could lead to the legalization of the signs.