Casino owner Penn National Gaming has mounted a legal challenge to Pennsylvania’s newly enacted law that paves the way for gambling expansion in the state.

The York Dispatch reported that Penn National has asked the federal court in Harrisburg to declare Pennsylvania’s new gaming expansion law as unconstitutional, claiming that it violates the company’s constitutional rights to equal protection and due process.

Penn National’s lawsuit was filed on Tuesday, a day before the state regulator auctions the first of 10 mini-casino licenses in the state, according to The Sacramento Bee report.

The Pennsylvania Gaming Control Board announced that the starting bid for the coveted casino licenses is at $7.5 million. The license allows winning bidders to operate 750 slot machines and they can also purchase another $2.5 million separate certificate to operate at least 30 table games.