CCP stands for Chief Commissioner of Police, the inquiry heard.

At the time, retired chief Graham Ashton was the chief commissioner.

The involvement of police in the scheme has been a sticking point in the inquiry.

Jobs Department official Claire Febey told the inquiry she was told it was the police's preference that private security be used, but it wasn't clear where the recommendation had ultimately come from.

Police presence has been a sticking point in the inquiry as officers had been used in the NSW program, but not in Victoria.

The lawyer for Emergency Management Victoria Dr Kristine Handscombe QC told the inquiry EMV's

Commissioner Andrew Crisp requested a 24/7 police presence in hotels on July 17.

Commander Tully said there has been a police presence in two hotels in Melbourne's CBD, but the hotels are not being used to quarantine international arrivals.

"That is separate to the hotel quarantine program in terms of international returned travellers," he said.