The vote over sponsorship rules – at the centre of a furious battle between the Premier League and Manchester City – is believed to be on a knife edge, with 24 hours to go.
On Friday, top flight sides will gather in London for a crunch summit which is expected to be followed by a ballot.
The competition has been forced to act after an independent panel found sections of the existing rules on associated party transactions (APTs) – deals between clubs and parties linked to their owners – to be unlawful after a legal challenge from City.