Media mogul Sumner Redstone must provide testimony in a legal battle over his mental competency and who will make medical decisions involving him, the AP reports.

“Los Angeles Superior Court Judge David J. Cowan ruled Monday that attorneys for the media mogul and Redstone’s ex-girlfriend and longtime companion will be allowed to solicit 30 minutes of sworn testimony from Redstone,” the story reports. “The session will be conducted at Redstone’s home and videotaped. Cowan says the video may be played at a trial on Redstone’s mental competency that is scheduled to begin on Friday, but the video will not be shown in open court. Cowan says the 92-year-old’s privacy rights supersede the public’s right to see Redstone in a ‘weakened state.'”

Redstone, whose media holdings include Viacom and CBS Corp., will not have to attend the trial, nor will he be required to provide live testimony, the report notes. The trial is expected to include testimony from a number of doctors and experts along with Redstone’s daughter Shari Redstone.