Kent Police has said plans to hold a match between Gillingham and Swindon behind closed doors is justified.
Chief Superintendent Alasdair Hope, of Kent Police, said: "The safety of fans attending this football match is our main priority and we are not prepared for their safety to be compromised.
"The provision of an appropriate number of police officers inside the stadium is essential, and the cost of this must be met by Gillingham FC.
"To expect Kent Police and the tax-payer to subsidise a commercial event is not acceptable. Commercial enterprises across the country pay for the policing of their events, including football matches, and no one is exempt."