Training partners Lee and Shannon Hope will have their cobalt charges heard by the RAD Board two days before the Caulfield Cup.

The Hope's face charges over positive samples to cobalt at a concentration in excess of 200 micrograms per litre of urine taken from Best Suggestion, Choose and Windy Citi Bear following races last year.

They face charges over the administration, or causing to be administered, the prohibited substance as well as the presentation of the horses to race with a prohibited substance in their system.

At a directions hearing on Wednesday, the RAD Board advised the hearing will commence on October 15, with three days currently set aside.

Three other Victorian trainers, Peter Moody, Mark Kavanagh and Danny O'Brien have been charged over cobalt levels in their horses.

Hearing dates against those trainers will be finalised once directions hearings have be held.