Beginning not earlier than five years after
December 11, 1980, the President shall promulgate requirements (for facilities in addition to those under subtitle C of the Solid Waste Disposal Act [
42 U.S.C. 6921 et seq.] and other Federal law) that classes of facilities establish and maintain evidence of financial responsibility consistent with the degree and duration of risk associated with the production, transportation, treatment, storage, or disposal of hazardous substances. Not later than three years after
December 11, 1980, the President shall identify those classes for which requirements will be first developed and publish notice of such identification in the Federal Register. Priority in the development of such requirements shall be accorded to those classes of facilities, owners, and operators which the President determines present the highest level of risk of injury.