UEFA’s Club Financial Control Board (CFCB) is expected to issue the ruling on Monday, but with certain conditions attached.
As it stands, the current rules stipulate that no teams can play in the same competition as another club that has shared ownership.
Sir Jim Ratcliffe owns Ligue 1 side Nice, who qualified for the Europa League this season, as did Manchester United, who he also has a minority stake in.
Girona, part of the City Football Group, finished third in LaLiga this season, qualifying for the Champions League, alongside Manchester City.
But UEFA will give approval to both Manchester teams to play alongside their sister clubs in Europe next season, so long as Nice and Girona are operated via a “blind trust”.