Victoria Police are making a new bid to ban controversial jockey Danny Nikolic from racetracks.

It comes after the Supreme Court ruled in June that bans against the Caulfield Cup-winning jockey were unlawful because he was not given details of the adverse allegations against him.

Lawyers for Victoria Police appeared before the Court of Appeal on Monday seeking leave to appeal that ruling.

The court was closed twice during the hearing with media told to leave so discussions between the legal parties could be held in secret.

Nikolic was first disqualified from racing for two years after being found guilty of threatening chief steward Terry Bailey at a Seymour race meeting in 2012.

He incurred a further penalty for offensive conduct towards another steward outside a VCAT hearing room during an appeal against the two-year ban.