Richard Keen QC was to spell out the club's case at an SFA Appeals Panel hearing at Hampden. Mr Keen, the Dean of the Faculty of Advocates, was to argue a season-long embargo on signing players and a £160,000 fine imposed by a Judicial Panel last month is unfair.
The penalties were for bringing the game into disrepute following last year's takeover by Craig Whyte and the non-payment of PAYE and VAT. The club's argument is that former chairman Mr Whyte was acting alone and that Rangers should not be punished for his actions.
Mr Keen successfully defended one of the men accused of the Lockerbie bombing and has been involved in several other high -profile cases, including the Piper Alpha inquiry. The appeals process could last up to three days.
Panel members are High Court judge Lord Carloway, Spartans FC chairman Craig Graham and former Partick Thistle chairman Allan Cowan.
Mr Keen will be paid by the Rangers Fighting Fund, which was set up to receive donations from fans after the club went into administration in February.
Rangers administrators Duff & Phelps said the penalties were "draconian" and team manager Ally McCoist said they could "kill" the club as it tries to get back into business.