(b)
Revision of regulations
Each regulation promulgated under this chapter shall be reviewed and, where necessary, revised not less frequently than every three years.
(c)
Criminal investigations
In carrying out the provisions of this chapter, the Administrator, and duly-designated agents and employees of the Environmental Protection Agency, are authorized to initiate and conduct investigations under the criminal provisions of this chapter, and to refer the results of these investigations to the Attorney General for prosecution in appropriate cases.