After the very public failure of a number of Arctic drilling attempts last year, Big Oil companies are lobbying the government of Canada to extend their drilling licenses and relinquish hundreds of millions in security deposits, reporting on Monday revealed.

The National Observer‘s Mike De Souza reports that the Trudeau administration is proceeding with a review of Canada’s Petroleum Resources Act, which “internal federal briefing notes show” was initiated by the government of former Prime Minister Stephen Harper—a notorious “climate villain”—at the behest of oil industry lobbyists.

According to De Souza, as the law currently stands, companies including “Imperial Oil, Exxon Mobil Corp., BP Plc., and Chevron Corp. would be forced in the coming years to walk away from their proposed projects since they have not been able to convince federal authorities that they can drill for oil in the Arctic—before their licenses expire—without causing an environmental disaster.”

Not only do those oil giants want an extension on their contracts, they are seeking repayment on the collective $500 million in security deposits to obtain those licenses—after they give Arctic drilling another shot.