Father-and-son trainers Lee and Shannon Hope will find out on Tuesday if they have been handed lengthy disqualifications for administering cobalt to three of their racehorses.

The Hopes face a minimum three-year disqualification after being found guilty of intentionally administering cobalt to affect the horses' performance.

Shannon Hope is likely to face a harsher penalty than his 64-year-old father with Judge Russell Lewis saying the Racing Appeals and Disciplinary Board's preliminary view is that he is more culpable.

The Hopes' legal counsel Robert Stitt QC has argued the board should use its judicial discretion or special circumstances allowances to impose a fine on Lee Hope rather than disqualify him so he can continue his five decade-long training career.

Stitt on Thursday asked for a fine for Shannon Hope or otherwise a disqualification that was not crushing on him and would allow him to return to the sport.

Shannon Hope was responsible for the feeding and supplementation regime that the training partnership argued led to Windy Citi Bear, Best Suggestion and Choose returning elevated cobalt levels above the raceday threshold of 200 micrograms per litre of urine.

The RAD Board found the supplements and intravenous regime was not a credible explanation and agreed with racing stewards that cobalt exceeding the allowed threshold was administered on or before race day.

In its decision handed down on Thursday, the board said the Hopes both knew far more about cobalt than they admitted.

Stitt argued Shannon Hope had overused legitimate substances but Racing Victoria stewards' legal counsel James Ogilvy said the Hopes were found to have deliberately administered cobalt to the horses to affect their performance in races.

The board will announce its penalty decision at 11am (AEDT) on Tuesday.