Who Has Salvage Rights To Philly Mansion?

The Philadelphia Inquirer is reporting that the Addison Mizner-designed, 1929 La Ronda mansion on Philadelphia's Main Line is slated for demolition and that architectural salvage rights have already been awarded. Anyone know who has the salvage rights? There's has been a last-minute flurry of activity with a potential buyer surfacing who wants to move the massive structure. I don't think it will happen.

Inquirer Article Link