SAN FRANCISCO INT’L AIRPORT (CBS / AP) — The City of San Francisco has filed a lawsuit accusing a startup that allows travelers to rent out their cars instead of paying for airport parking of flouting San Francisco International Airport rules.

FlightCar, Inc. has refused to pay the airport 10 percent of its profits and $25 per rental like rental car companies.

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FlightCar said it is not a rental car company, but a mix between ride sharing and off-airport parking. It says it does not operate on airport property and is accordingly out of reach of airport fees.

But San Francisco attorneys say SFO is entitled to collect fees from rental car companies that mainly serve its travelers even if they are not on airport property.

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They also accuse FlightCar of violating other rules.

The company has until July 1 to respond to the lawsuit.

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