The purpose of this final rule is to dispose of petitions for reconsideration of the final rules published in the May 22, 1980, Federal Register (45 FR 34560) and to make a number of corrections and clarifications to those rules regarding the following subjects: (1) A numerical identification system for hazardous materials transported in commerce; (2) Regulations pertaining to the transportation of hazardous wastes; (3) Regulations pertaining to the identification of, and discharge notifications for, hazardous substances; (4) Identification of certain forbidden materials- by name and revisions to the general criteria applicable to forbidden ,materials; (5) Proper shipping names for organic peroxides; and , (6) A requirement for entering on 'shipping papers the technical names of certain hazardous components of materials covered by n.o.s. entries.