Not later than twelve months after November 8, 1984, the Administrator shall propose whether to list or identify used automobile and truck crankcase oil as hazardous waste under section
6921 of this title. Not later than twenty-four months after November 8, 1984, the Administrator shall make a final determination whether to list or identify used automobile and truck crankcase oil and other used oil as hazardous wastes under section
6921 of this title.