Glen Boss shook the hand of chief steward Terry Bailey after his unsuccessful appeal to have a careless riding ban reduced so he could ride Puissance de Lune in the Cox Plate at Moonee Valley on Saturday.

But the champion jockey was not feeling so generous towards fellow hoop Nick Hall who he blamed for much for the interference that occurred in the race before the field passed the winning post for the first time in Saturday's Caulfield Cup.

Boss told Victoria's Racing Appeals and Disciplinary Board he was angry with the Cup-winning Hall who he said did not call when Boss shifted in his mount Silent Achiever, unaware Glencadam Gold was going to end up on the rails.

Boss said he looked as he moved inside but only became aware Glencadam Gold was there when his jockey Tommy Berry called out, which caused Boss to take corrective action.

He said Hall, riding Fawkner, had a reputation for not calling as jockeys juggled for position in races.

"He remained quiet and his actions weren't those of a rider who was under pressure," Boss said.

"I thought `he has got me a beauty. It's going to be my fault and he will get away with it'.

"I'm putting a lot of the blame on Nick Hall."

Boss said it was more than just a gentleman's agreement between jockeys to call out in tight situations, it was also a safety issue.

But Bailey said Hall had nowhere to go once Boss shifted in causing a chain reaction.

"Tommy Berry is already on the fence, what is Hall to do," Bailey said.

RAD chairman Russell Lewis said the 12-meeting ban was well within the range of penalties for such an offence.

"They gave me fair hearing. I have to abide by the rules, I will move on," Boss said.

Ben Melham will take his ride in the Group One race.

In an earlier hearing, Hall was looking to decrease a 10-meeting ban imposed on him on Saturday for careless riding in a support race on the card.

But the board was not impressed with his riding record this year which Lewis described as "appalling".

"If not for his record he would have succeeded (in his appeal)," Lewis said.

Hall was due to ride the Lloyd Williams-owned Masked Marvel in the Cox Plate with Michael Rodd now aboard after losing his mount, Atlantic Jewel, ruled out with a tendon injury.