Bidders for Chelsea will reportedly have to guarantee that they won't sell the club for at least a decade.
The 19-year tenure of Roman Abramovich at Stamford Bridge is coming to an end with the club to be sold in a deal worth around £2.5billion.
A preferred bidder for the Blues is set to be announced by Raine Group, the merchant bank handling the auction, in the coming days.
Sky News have reported that Raine have contacted the three shortlisted bidders - Todd Boehly, Sir Martin Broughton and Steve Pagliuca - asking them to provide commitments that they won't sell the club until 2032 at the earliest.